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Neco Gce NECO GCE ANSWERS 2019 (BEST SOLUTION CENTER)

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    NECO GCE TIMETABLE 2019


    Monday 18th Nov. 2019 – Actual Date and Time to be Fixed by the Council.

    French Paper IV (Aural Comprehension & Oral Expression) –
    Arabic Paper IV (Oral) –
    ======================================

    Tuesday 19th Nov. 2019

    Agricultural Science Paper I (Alternative to Practical) – 2.00 pm – 3.30 pm
    ======================================

    Wednesday 20th Dec. 2019

    Store keeping Paper III & II (Objective & Essay) – 2.00 pm – 4.40 pm
    Marketing Paper III & II (Objective & Essay) – 2.00 pm – 4.40 pm
    Salesmanship Paper III & II (Objective & Essay) 2.00 pm – 4.40 pm
    ======================================

    Thursday 21st Nov. 2019

    Technical Drawing Paper I (Practical) – 2.00 pm – 5.00 pm
    Physical Education Paper I (Theory of Practice) – 2.00 pm – 4pm
    ======================================

    Friday 22nd Nov. 2019

    Biology Paper I (Alternative to Practical) – 3.30 pm – 5.30 pm
    ======================================

    Saturday 23rd Nov. 2019

    Further Mathematics Paper III (Objective) – 10.00 am – 12.00 noon
    Further Mathematics Paper II (Essay) – 12.10 pm – 2.40 pm
    Stenography Paper IV Practical (Word Processing) – 10.00 am – 12.00 pm
    Stenography Paper I Practical – 12.00 noon – 1.17 pm
    Health Education Paper III & II (Objective & Essay) – 3.00 pm – 4.30 pm
    ======================================

    Monday 25th Nov. 2019

    Physics Paper I (Alternative to Practical) – 2.00 pm – 4.45 pm
    ======================================

    Tuesday 26th Nov. 2019

    Government Paper III & II (Objective & Essay) – 2.00 pm – 4.40 pm
    ======================================

    Wednesday 27th Nov. 2019

    Chemistry Paper I (Alternative to Practical) – 2.00 pm – 4.40 pm
    ======================================

    Thursday 28th Nov. 2019

    Arabic Paper III (Objective) – 2.00 pm – 3.30 pm
    Arabic Paper II (Essay & Literature) – 3.30 pm – 5.30 pm
    ======================================

    Friday 29th Nov.2019

    Biology Paper III & II (Objective & Essay) – 3.00 pm – 5.30 pm
    ======================================

    Saturday 30th Nov. 2019

    General Mathematics Paper III (Objective) – 1.00 pm – 2.45 pm
    General Mathematics Paper II (Essay) – 3.00 pm – 5.30 pm
    ======================================

    Monday 2nd Dec. 2019

    Technical Drawing Paper III & IV (Objective & Drawing) – 2.00 pm – 4.30 pm
    Physical Education Paper III & II (Objective & Essay) – 2.00 pm – 4.00 pm
    ======================================

    Tuesday 3rd Dec. 2019

    Commerce Paper III & II (Objective & Essay) – 2.00 pm – 4.40 pm
    Chemistry Paper III & II (Objective & Essay) – 2.00 pm – 5.00 pm
    ======================================

    Wednesday 4th Dec. 2019

    Agricultural Science Paper III & II (Objective & Essay) – 2.00 pm – 4.30 pm
    ======================================

    Thursday 5th Dec. 2019

    Physics Paper III & II (Objective & Essay) – 2.00 pm – 5.00 pm
    History Paper III & II (Objective & Essay) – 2.00 pm – 5.00 pm
    ======================================

    Friday 6th Dec. 2019

    Geography Paper II (Essay) – 3.30 pm – 5.30 pm
    ======================================

    Saturday 7th Dec. 2019

    English Language Paper II (Essay) – 10.00 am – 11.45 am
    English Language Paper III (Objective) – 11.45 am – 12.45 am
    English Language Paper IV (Test of Orals) – 1.00 pm – 1.45 pm
    ======================================

    Monday 9th Dec. 2019

    Literature in English Paper III (Objectives) – 2.00 pm – 3.00 pm
    Literature in English Paper IV (Prose) – 3.00 pm – 4.15 pm
    ======================================

    Tuesday 10th Dec. 2019

    Economics Paper III & II (Objective & Essay) – 2.00 pm – 5.00 pm
    ======================================

    Wednesday 11th Dec. 2019

    Christian Religious Studies Paper III & II (Objective & Essay) – 2.00 pm – 4.30 pm
    Islamic Studies Paper III & II (Objective & Essay) – 2.00 pm – 4.30 pm
    ======================================

    Thursday 12th Dec. 2019

    French Paper I (Written Comprehension) – 2.00 pm – 3.00 pm
    French Paper II (Written Expression) – 3.00 pm – 4.45 pm
    ======================================

    Friday 13th Dec. 2019

    Literature in English Paper II (Drama & Poetry) – 3.30 pm – 5.10 pm
    ======================================

    Saturday 14th Dec. 2019

    Financial Accounting Paper III (Objective) – 10.00 am – 11.20 am
    Financial Accounting Paper II (Theory & Practice) – 11.20 am – 1.50 pm
    Health Education Paper I (Test of Practical) – 3.00 pm – 4.30pm
    ======================================

    Monday 16th Dec. 2019

    Civic Education Paper III & II (Objective & Essay) – 2.00 pm – 4.40 pm
    ======================================

    Tuesday 17th Dec. 2019

    Hausa Paper III & II (Objective & Essay) – 2.00 pm – 5.00 pm
    Igbo Paper III & II (Objective & Essay) – 2.00 pm – 5.00 pm
    Yoruba Paper III & II (Objective & Essay) – 2.00 pm – 5.00 pm
    ======================================

    Wednesday 18th Dec. 2019

    Geography Paper III & I (Objective & Practical) – 2.00 pm – 4.30 pm
    Stenography Paper III & II (Objective & Essay) – 2.00 pm – 4.00 pm
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    Tuesday, 19th November, 2019

    Agricultural Science Paper I (Alternative to Practical) – 2.00 pm – 3.30 pm


    ====================


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    AGRICULTURAL SCIENCE PRACTICAL ANSWERS

    (1a)
    A - Knapsack sprayer
    B - Axe
    C - Sickle

    (1b)
    Specimen B:
    (i) possession of wooden handle
    (ii) possession of metal blade

    Specimen C:
    (i) It consist of a curved metal blade
    (ii) It usually have short wooden handle


    (1c)
    (i) Use protective clothing when spraying
    (ii) Do not smoke, eat or drink when spraying

    (1d)
    A - It can be used to apply liquids such as fertilisers, herbicides and fungicides

    B - It is used to shape, split and cut wood

    C - It is used for harvesting or reaping grain crops

    (1e)
    (i) Grease metal part before storage
    (ii) Clean after use
    (iii) Store in a cool, dry place

    ==================================================

    2a)
    (i) Place a soil sample on the aluminium dish
    (ii) Apply heat to dry the sample soil
    (iii) Weigh the the soil sample after drying
    (iv) Weigh the aluminium dish to determine the weight of the soil sample

    (2b)
    (i) Retort stand
    (ii) Bunsen burner
    (iii) Aluminium dish

    (2c)
    Mass of empty dish = 29g
    Mass of dish + fresh soil = 42g
    Mass of dish + dry soil = 39g
    % moisture content of soil = Mass of water/Mass of fuel soil × 100/1
    Mass of fresh soil = 42 - 29 = 13g
    Mass of water = 39 - 29 = 10g
    = 10/13 × 100/1 = 76.92%

    (2d)
    (i) Sediment particles are small
    (ii) Low pore spice present
    (iii)capillaries are high

    (2e)
    (i) Crop rotation practice
    (ii) Irrigation

    ==================================================

    (3a)
    Specimen E: Onion
    Specimen F: okra
    Specimen G: beans

    (3b)
    Specimen E: Allium cepa
    Specimen F: Abelmoschus esculentus
    Specimen G: Phaseolus vulgaris

    (3c)
    Weeding

    (3d)
    Spacing required of specimen E is 30cm by 30cm

    (3e)
    It is propagated by seed

    (3f)
    (i)it ensure the maximum used of land
    (ii)beans supply nutrient necessary for specimen G to grow well

    (3g)
    (i)grasshoppers
    (ii)weavil

    (3h)
    (i)blight disease
    (ii)rosette disease

    ==================================================

    (4a)
    Specimen H: bird nail
    Specimen I: is feather

    (4b)
    H: hawk
    I: guinea fowl

    (4c)
    (i)through boiled water
    (ii)hand picking

    (4d)
    (i)during processing for food
    (ii)for industrial use

    (4e)
    (i)for it protection
    (ii)for it locomotion
    (iii)for it incubation of eggs
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    Wednesday, 20th November, 2019

    Marketing Paper III & II (Objective & Essay) – 2.00 pm – 4.40 pm

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    Market-Obj

    1CEDBEABADD
    11AAACCAEEAE
    21BDDCDBCCEB
    31DDBDDEBABA
    41AADACCAABB
    51CCDBBAACCC
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    MARKETING ANSWERS

    (8a)
    Consumer behaviour is the study of individuals, groups, or organizations and all the activities associated with the purchase, use and disposal of goods and services, including the consumer's emotional, mental and behavioural responses that precede or follow these activities.

    (8b)
    (i)Decrease in distribution cost:
    Second important liability of marketing is control the cost of distribution. Through effective marketing the companies can reduce their distribution costs to a great extent.

    (ii)Protection against business slump:
    Business slump cause unemployment, slackness in the success of business and great loss to economy.

    (iii)Increasing employment opportunities: Marketing comprises of advertising, sales, distribution, branding and many more activities. So the development of marketing automatically gives rise to a need for people to work in several areas of marketing.

    (iv)Delivery of standard of living to the society:
    A society is a mixture of diverse people with diverse tastes and preferences. Modern marketing always aims for customer satisfaction. So, main liability of marketing is to produce goods and services for the society according to their needs and tastes at reasonable price.
    =====================================

    (7a)
    societal marketing is a marketing concept that holds that a company should make marketing decisions not only by considering consumers' wants, the company's requirements, but also society's long-term interests While profit-orientation is pricing strategy involves setting prices for your products that will guarantee you'll make money on each sale.

    (7b)
    (i)Exchange: de goods or services. In marketing theory, every exchange is supposed to produce "utility," which means the value of what you trade is less than the value of what you receive from the trade.

    (ii)Transaction: oint of sale" transactions. The emphasis is on maximizing the efficiency and volume of individual sales rather than developing a relationship with the buyer.

    (iii)Product: is the marketplace where final goods or services are sold to businesses and the public sector. Focusing on the sale of finished goods, it does not include trading in raw or other intermediate materials.

    (iv)Marketing intermediaries: independent firms which assist in the flow of goods and services from producers to end-users; they include agents, wholesalers and retailers.
    =====================================

    (1a)
    Product life cycle (PLC) is the cycle through which every product goes through from introduction to withdrawal or eventual demise.

    (1b)
    (i)Development: The product development stage is often referred to as “the valley of death.” At this stage, costs are accumulating with no corresponding revenue. Some products require years and large capital investment to develop and then test their effectiveness.

    (ii)Introduction: The introduction stage is about developing a market for the product and building product awareness. Marketing costs are high at this stage, as it is necessary to reach out to potential customers.

    (iii)Growth: In the growth stage, the product has been accepted by customers, and companies are striving to increase market share. For innovative products there is limited.

    (iv)Maturity: At the mature stage, sales will level off. Competition increases, so product features may need to be enhanced to maintain market share.
    =====================================

    (9a)
    Transportation is the process of conveying goods and people from one place to another either through water,road,rail or air. It is simply the movement of goods and people from one place to another.

    (9b)
    (choose any four)
    (i)Nature of goods:The nature of goods to be transported will determine the means of transportation to be used.perishable and fragile goods for example are better handled by fast means of transportation like aircraft while bulky goods are better handled by ship or rail

    (ii)cost of transport: The overall cost of transport does determine the choice of means of transportation.Air transport is costly while rail is cheap over a long distance and this will determine the choice of either of the two to use.

    (iii)weighty/bulky goods:Goods that are heavy and bulky are better moved by road,rail and sea while light goods are best suited for air transport

    (iv)The value of the goods: commodities with high values like jewellery are better transported by air so as to reduce pilferage.

    (v)Distance involved: When the distance is long ,the best means of transportation are water and air ,irrespective of the cost while road transportation is goof over short distance
    =====================================

    (4a)
    promotional mix describes a blend of promotional variables chosen by marketers to help a firm reach its goals. In other words It has been identified as a subset of the marketing mix.

    (4b)
    (i)Advertising:
    Advertising is defined as any form of paid communication or promotion for product, service and idea. In other words Advertisement is not only used by companies but in many cases by museum, government and charitable organizations
    (ii)Sales Promotion:
    Promotion is an incentive tool used to drive up short term sales. In other words Promotion can be launched directed at consumer or trade.
    (iii)Public Relations:
    Companies cannot survive in isolation they need to have a constant interaction with customers, employees and different stakeholders. This servicing of relation is done by the public relation office.
    (iv)Direct Marketing:
    The communication establishes through a direct channel without using any intermediaries is referred to as direct marketing. Direct marketing can be used to deliver message or service.
    =====================================

    (5a)
    (i)Tariff: Tariff is a tax on imports or exports between sovereign states. It is a form of regulation of foreign trade and a policy that taxes foreign products to encourage or safeguard domestic industry. Traditionally, states have used them as a source of income.

    (ii)quota: quota is a government imposed trade restriction that limits the number or monetary value of goods that a country can import or export during a particular period. Countries use quotas in international trade to help regulate the volume of trade between them and other countries.

    (iii)Embargo:embargo is a government order that restricts commerce with a specified country or the exchange of specific goods. An embargo is usually created as a result of unfavorable political or economic circumstances between nations.

    (5b)
    (i)Polycentric approach: Polycentric Approach is the international recruitment method wherein the HR recruits the personnel for the international businesses. In Polycentric Approach, the nationals of the host country are recruited for the managerial positions to carry out the operations of the subsidiary company.

    (ii)Ethnocentric Approach: Ethnocentric Approach is one of the methods of international recruitment wherein, the HR recruits the right person for the right job for the international businesses, on the basis of the skills required and the willingness of the candidate to mix with the organization's culture.
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    Friday, 22nd November, 2019

    Biology Paper I (Alternative to Practical) – 3.30 pm – 5.30 pm

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    BIOLOGY PRACTICAL ANSWERS

    (1a)
    A - Tilapia fish
    B - Frog
    C - Lizard
    D - Bird

    (1aii)
    A - Pisces
    B - Amphibia

    (1aiii)
    I - Lateral lines
    II - Pectoral fin.
    III - Tympanum
    IV - Digits
    v - Tail
    VI - Unwebbed digits.
    VII - Beak
    VIII - Eye

    (1aiv)
    II - For movement and balance.
    III - For hearing.
    IV Movement/crawling.
    VI - Crawling.
    VII - For Feeding.
    VIII - For Seeing

    (1av)
    Under B
    (i) It lives in water and in land.
    (ii) It possesses beak.
    (iii) Presence of long legs.
    (iv) Absence of scales on legs.

    Under D
    (i) It lives on trees.
    (ii) Absence of beak.
    (iii) Absence of long legs.
    (iv) Presence of scales on long legs

    =====================================

    (2ai)
    I - Funnel
    II - Cotton wool
    III - Beaker

    (2aiii)
    X = 50 - 35 = 15cm²

    Y = 50 - 22 = 28cm²

    Z = 50 - 15 =35cm²

    (2aiii)
    X - Sandy soil
    Y - Loamy soil
    Z - Clay soil

    (2aiv)
    Ha:
    (i) Large soil particles.
    (ii) Large pore spaces.

    Hb:
    (i) Moderate particle size.
    (ii) Moderate pore space.

    Hc:
    (i) Small or fine particle size.
    (ii) Little pore spaces.

    (2av)
    Experiment on water retention capacity of soil.

    (2bi)
    Lowest - January
    Highest - September

    (2bii)
    (i) June
    (ii) July

    (2biii)
    32 + 32
    = 64cm²

    (2biv)
    (i) Osun
    (ii) CrossRiver

    (2bv)
    Tropical rainforest

    =====================================

    (3ai)
    J - Coconut fruit
    K - Tomato fruit

    (3aii)
    J - Man
    K - Animal
    L - Wind

    (3aiii)
    I - seed
    II - fibrous mesocarp
    III - seed
    IV - Exocarp
    V - Fruit stalk
    VI - Placenta

    (3bi)
    M - House
    N - Spider

    (3bii)
    M– Class insecta
    N– class Arachnida

    (3biii)
    TABULATE

    (M)
    - Three pairs of working legs are present

    - anterna is present

    - the body is divided in to head, thurax and abdomen

    (N)
    - present of four working legs

    - No antenna is N

    - the body is divided in to heat and cephalothorax
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    Monday, 25th November, 2019

    Physics Paper I (Alternative to Practical) – 2.00 pm – 4.45 pm
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    PHYSICS PRACTICAL ANSWERS

    [IMG]

    [IMG]

    (1bi)
    (i)the total upward force must balance the downword
    (ii) the algebraic sum of all forces act on the body must be equal to zero

    (1vi)
    slope = Y2-Y1/x2-x1
    =70-20/1.4-0.4
    = 50/1
    =50g

    (1vi)
    (i) I avoid error due to parallel when taking all my reading
    (ii)I made sure that the meter rule beconect horizontally before taking my reading

    =====================================


    (3ai -3aiv)
    S/N|R(ohms)|V(v)|I(A)|1/v(A/v)|R-¹(ohm-¹)|
    1 | 1.0|1.21|1.80|1.49|1.00
    2 | 2.0|1.50|1.50|1.00|0.50
    3 | 3.0|1.64|1.36|0.83|0.33
    4 | 4.0|1.72|1.29|0.75|0.25
    5 | 5.0|1.76|1.23|0.70|0.20

    (3av)
    [IMG]

    (3avi)
    Slope = ΔA/V / ΔR-¹
    = 1.28 - 0.80/ 0.80 - 0.30
    = 0.48/0.50
    = 0.96

    Intercept (c) = 0.50

    (3avii)
    (i) I would ensure I made tight connection before taking my reading.
    (ii) I would ensure I noted zero error on the voltmeter and Ammeter

    (3bi)
    Potential difference is the work done in moving a unit charge from a point in electric field to another. It has the unit of Volt.
    V = work done/charge

    (3bii)
    r = 0.5ohms
    I = 1.2A
    R = ?
    E = 3v
    E = I(R+r)
    E = IR + Ir
    E - Ir = IR
    R = E - Ir/I
    = 3 - 1.2 × 0.5/1 .2
    = 3 - 0.6/1.2
    R = 2.4/1.2
    R = 2 ohms
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    Government-Obj

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    GOVERNMENT ANSWERS

    (5)
    (i)Fairness Among Different Ethnic Groups:The government should embrace fairness in order to eliminate the issue of favoritism in Nigeria.

    (ii)Removal Of Indigene And Non-Indigene Separation; For a proper development of federalism in Nigeria, there should be a removal of indigene and non-indigene dichotomy from the constitution. It is really Abad idea for nation-building and national integration to see fellow Nigerians, whom were born and may have lived in a place all their lives, apply for a job and be rejected.

    (iii)The Practice Of Fiscal Federalism; According to Chris Attah, such practice is the panacea to the problems plaguing Nigeria and its development. Attah said that if the government accepts fiscal federalism, most of Nigeria’s problems would be solved.

    (iv)Equal Decentralization Of Power: The federalism in Nigeria has structured in a way that the Central government holds more power than the state government. Which is not supposed to be so. There should be an equal distribution of power between the federal and the state government.

    (v)Review Of Federal Character Principles:what does this mean? It implies mean it should not just adhere to with insincerity or with a lenient hand rather a strict and core action should be seen to the full implementation and allow fair entitlement among all ethnic groups in the country.

    (vi)Promotion Of States Internal Revenue: For a well-defined federalism to be practiced in Nigeria, each level of government should have enough resources and funds to perform its project without appealing to the other level of government for financial assistance.
    ======================================

    (2a)
    A republic is a form of government in which the country is considered a "public matter", not the private concern or property of the rulers. The primary positions of power within a republic are attained, through democracy, oligarchy and autocracy


    (2b)
    (i) Sovereignty in the hands of the people: The power of a republican government emanates from the people. The people elect the government through a general election. The government of the day generally exists for the benefit of the people. The people are dissatisfied with the performance of the government, they can remove or replace the during the next general elections. Sovereignty therefore lies in the hands of the people.

    (ii) Fixed Term of Office: In a republican system of government, the constitution prescribes a fixed term of office for the president, usually, four years, but in some cases five or even seven years. The mandate of the president can be renewed only once, after which the president can no longer be constitutionally be elected. Another person must offer him or herself to be elected.

    (iii) Periodic Elections: In a republic system of government, elections are conducted periodically and all political positions are contested for by individuals. For example Ghana and the United States, among other republican countries organize general elections every four years.

    (iv) Universal Adult Suffrage: In a republican system of government, elections are held on the basis of universal adult suffrage. This means all qualified adult voters are allowed to cast their ballots.

    (v) Supremacy of the constitution: In a republican system of government, the constitution is the supreme law of the land. Any other law found to be inconsistent with any provision of the constitution can be challenged in the court of law. If proven, such law is declared null and void.
    ======================================

    (1)
    (i)Age: In some countries ,25years of age may be the minimum age for seeking election into house of Representative and 35years of age for presidential eg Nigeria.

    (ii)Residential qualification : The candidate must have lived in the country or community for a number of years or months as stipulated in the constitution of the country.

    (iii)Educational qualification: Educational qualification is another condition for standing as a candidate for any election. In some countries eg Nigeria,for any elective post eg into the parliament, the individual must have a minimum of West African school certificate.

    (iv)Payment of tax: He must be ready to provide the evidence of payment of tax at least for some years.

    (v)No criminal record:He must not be found to have involved in any criminal case or to have been imprisoned for any criminal offence.

    (vi)Citizenship:Candidates for any elective post in many countries must be citizen of that country.


    (7)
    (i) The struggle for self-government
    (ii) Political rights
    (iii) Publications
    (iv) Nationalist opposition
    (v) Constitutional conferences
    (vi) Sending of delegates to London

    EXLANATIONS:
    (i) The struggle for self-government: The party encouraged the unity of Nigerians and was foremost in the struggle for self-government in Nigeria.

    (ii) Political rights: It educated Nigerians on their political rights.

    (iii) Publications: It introduced and published the West African Pilot which served as a powerful platform for opposing colonial rule.

    (iv) Nationalist opposition: The party was the brain behind nationalists opposition to the 1946 Richard's constitution.

    (v) Constitutional conferences: It took part in the most of the constitutional conferences, eg the 1953 London constitutional conferences.

    (vi) Sending of delegates to London: The part was instrumental to the sending of delegates to London tp protest the 1946 constitution.
    ======================================

    (8)
    (i)The Press: Newspapers played an effective role in awakening the minds of Nigerians towards the struggle for self-rule, e.g. West-African Pilot and Lagos Daily News. This, in turn, caused an increase in the activity of the press in the country.

    (ii)Constitutional Change: Nationalism resulted in the reform of most of the colonial constitutions. This change was necessary in order to involve Nigerians in the affairs of the country.

    (iii)Political Education: One of the effects of nationalism is the encouragement it gave to political education and training of future leaders. People were also educated on their political rights

    (iv)Independence: Nationalism or nationalists’ activities led to the independence of Nigeria on the 1 st of October, 1960.

    (v)Formation of political parties: Nationalism led to the formation of poitical parties eg NNDP,NCNC,NPC,AG etc These parties played key roles in de-colonisation process.

    (vi)Constitutional conferences: Nationalism also resulted in Nigerians taking part in some of the constitutional conferences both within and outside the country. In the process,reforms were brought into the political system
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    CHEMISTRY PRACTICAL ANSWERS

    (1ai)
    In a tabular form:

    Titration | 1 | 2 | 3
    Final burette reading |25.60|30.35|25.30
    Initial burette reading|0.85 |5.65 |1.50
    Vol. of acid used |24.75|24.70|23.80

    (1aii)
    Average volume of acid used
    VA = (VA1 + VA2 )/2 cm³
    VA = (24.75+24.70)/2
    VA = (49.45)/2 cm³ = 24.73cm³

    (1aiii)
    Neutralization reaction

    (1aiv)
    Draw the diagram

    (1av)
    The end point will not be affected if 10cm³ of distilled water is added to the reaction mixture while the titration progresses because the specific amount of Na2CO3 in 25.0cm³ of the mixture remains the same.

    (1bi)
    To find the CA
    Conc of Na2CO3 in moldm-³
    CB = 0.10moldm-³

    VB = 25.0cm³
    Using CAVA/CBVB = na/nb
    CA × 24.73/0.1×25 = 2/1
    CA = 2×0.1×25/24.73
    = 0.202moldm-³

    (1bii)
    Concentration of acid in gdm-³
    = molarconc × molarmass
    Where the molar mass of Hcl = 1 + 35.5
    = 36.5gmol-¹

    Therefore mass conc = 0.202moldm-³ × 36.5gmol = 7.37gdm-³

    (1biii)
    From the equation
    2Hcl(aq)+Na2CO3(aq) --> 2NaCl(aq)+H2O(l)+CO2(g)

    1 mole of base librates 2 moles of NaCl
    No of moles reacted
    n = CV/1000 --> 0.1×1000/1000 = 0.1mol Na2CO3

    Hence
    0.1mole of Na2CO3 = 2×0.1mole NaCl
    = 0.2mol NaCl

    Hence
    Mass conc of NaCl = Amount × molar mass
    = 0.2×(23 + 35.5)
    = 0.2 × 58.5
    = 11.7g/dm³

    (1biv)
    volume of CO2 liberated
    1 mole of Na2CO3 = 1 mole of CO2
    0.1 mole = 0.1 mole of CO2 = 22.4×0.1
    = 2.24dm³ = 2240cm³

    =====================================

    (2ai)
    OBSERVATION: Thre is water droplets around the test tube. It is colourless and odourless. It turns white anhydrous copper II tetraoxosulphate VI blue. It is neutral to litmus

    (2aii)
    INFERENCE: Fe²+, Cu²+ are suspected

    (2aiii)
    INFERENCE: SO4²-, CO3²-, and SO3²- are present

    (2aiv)
    INFERENCE: SO4²- present

    (2bi)
    INFERENCE: Dehydration of organic salt occurs

    (2bii)
    INFERENCE: Reducing sugar ie glucose is present


    (2biii)
    INFERENCE: Reducing sugar ie glucose is confirmed
    =====================================

    (3a)
    -Filtration removes Pb(SO4)2
    -Sublimation removes NH4Cl
    -Filtration and evaporation is used to recover NaCl

    (3bi)
    V1 = 50.0cm³
    C1 = 0.05moldm
    C2 = 0.01
    C1V1 = C2V2
    Using dilution formula
    0.05×50 = 0.01×V2
    V2 = 0.05×50/0.01 = 250cm³

    Hence volume of water that should be added
    V = V2 - V1 = 250 - 50 = 200cm³

    (3c)
    (I)Shine a beam of light to each of solutions of glucose and starch. Starch will disperse the ray of light (Tyndall effect) while glucose will not.

    (II)
    Chemical Test: Use Benedict's solution on starch; No positive result WHILE on glucose, It shows a positive test of brick red or orange colour.

    (3cii)
    Ammonia gas
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    DAILY SUBSCRIPTION

    Friday 29th Nov.2019

    Biology Paper III & II (Objective & Essay) – 3.00 pm – 5.30 pm

    ====================


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    BIOLOGY OBJ

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    BIOLOGY ANSWERS


    (1ai)
    Transpiration is the process where plants absorb water through the roots and then give off water vapor through pores in their leaves.

    (1aii)
    PLS TABULATE:

    MITOSIS:
    (i) Occurs in somatic cell/growth of somatic cells; (ii) Diploid cell formed
    (iii) Two daughter cells are formed (iv) Chromosome number of parent is same as that of daughter cell

    MEOSIS:
    (i) Occurs during gamete/sex cell production
    (ii) Haploid cell formed
    (iii) Four daughter cells are formed
    (iv) Chromosome number of parent twice that of daughter cells

    (1b)
    [Pick any FOUR]
    (i) They are protein in nature
    (ii) They remain chemically unchanged at the end of a reaction;
    (iii) They are denatured/destroyed at high temperature/inactivated at very cold temperatures
    (iv) Enzyme action is retarded by poison or inhibitors
    (iv) Enzymes are soluble
    (vi) They speed up rate of biochemical reactions in cells

    (1ci)
    Human beings are solely dependent on photosynthetic plants for their oxygen requirements
    (ii) It decreases the concentration of carbon dioxide and other harmful industrial wastes that leads to respiratory problems in living beings.

    (1cii)
    [Pick any TWO]
    (i) Gonorrhea
    (ii) Human Immunodeficiency Virus (HIV)
    (iii) Syphilis
    (iv) Genital Herpes

    (1ciii)
    (i) Sutures found between the bones of the skull
    (ii) Syndesmosis between long bones of the body

    =====================================

    (2a)
    [IMG]

    (2bi)
    (i) Eyelids
    (ii) Conjunctive
    (iii) The eye socket

    (2bii)
    (i) Cutting
    (ii) Layering
    (iii) Marcotting
    (iv) Budding

    (2ci)
    (i) Precipitation
    (ii) Condemnation
    (iii) Evaporation

    (2cii)
    (i) P.H
    (ii) Current
    (iii) Pressure
    (iv) Waves
    (v) Sunlight
    (vi) Turbidity
    =====================================

    (3ai)
    In a tabular form:

    POLLINATION:
    (i) It occurs only in flowering plants.
    (ii) It involves only one sex cell type (male).
    (iii) It requires external agents.
    (iv) No fusion of gametes involved.

    FERTILIZATION:
    (i) Occurs in all sexually reproductive plants.
    (ii) Involves two sex cells types (male and female).
    (iii) Does not require external agents.
    (iv) Involves fusion of gametes.

    (3aii)
    (i) Wind
    (ii) Insects

    (3bi)
    (i) Herbivores
    (ii) Carnivores
    (iii) Omnivores

    (3bii)
    (i) Herbivores -Goat
    (ii) Carnivores - Lion
    (iii) Omnivores - Man

    (3Ci)
    (i) It kills aquatic organisms.
    (ii) It makes water unsafe for consumption and domestic uses.
    (iii) It reduces light penetration in water hence affecting aquatic plants.
    (iv) It puts fishermen out of business.

    (3cii)
    (i) It transport unwanted materials to sites of excretion
    (ii) It transport nutrient to all body cells
    (iii) It helps in fighting infection
    (iv) It brings about clotting.
    =====================================
    (5ai)
    (i) Regulation of extracellular fluid volume. The kidneys work to ensure an adequate quantity of plasma to keep blood flowing to vital organs.
    (ii) Regulation of osmolarity.
    (iii) Regulation of ion concentrations.
    (iv) Excretion of wastes and toxins.
    (v) Production of hormones.
    (vi) Regulation of pH.

    (5aii)
    [Pick Any TWO]
    (i) Frequent urination.
    (ii) Excessive thirst.
    (iii) Unexplained weight loss.
    (iv) Extreme hunger.

    (5b)
    [IMG]
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    MATHEMATICS ANSWERS



    (1)
    √((0.0024)×35000)/0.0105

    No | Log
    0.024 |_3.3802
    35000 |4.5441
    - |=1.9243
    0.0105|_2.0212 -
    |3.9031 ÷2
    |1.9516

    √((0.0024)×35000)/0.0105
    Antilog of .9516 =89.45

    [IMG]
    =====================================

    (2a)
    Given that the roots of the equation are
    X = -2/3 and X = -3/2
    3x = -2 and 2x = -3
    3x + 2 = 0 and 2x + 3 =0
    (3x+2)(2x+3) = 0
    6x² + 9x + 4x + 6 = 0
    6x² + 13x + 6 = 0

    (2b)
    R = [3 4 0 ]
    [2 0 3 ]
    [1 2 2]

    (2ci)
    2/3R

    =2/3[3 4 0]
    [2 0 3]
    [1 2 2]

    = [⅔(3) ⅔(4) ⅔(0)]
    [⅔(2) ⅔(0) ⅔(3)]
    [⅔(1) ⅔(4) ⅔(2)]

    = [2 8/3 0 ]
    [4/3 0 2 ]
    [2/3 4/3 4/3]

    (2cii)
    |R|

    = |3 4 0|
    |2 0 3|
    |1 2 2|

    =3|0 3| -4|2 3| +0|2 0|
    |2 2| |1 2| |1 2|

    =3(2×0-3×2)-4(2×2-3×1)
    +0(2×2-0×1)
    =3(0 - 6)-4(4 - 3) +0(4 - 0)
    =3(-6) -4(1) +0(4)
    = -18 - 4 + 0 = -22

    (2ciii)
    The transpose of R
    = [3 2 1]
    [4 0 2]
    [0 3 2]

    [IMG]
    =====================================

    (3a)
    Given : R(3,5) and S(-2, -6)
    equation to line through them is :
    y-5/x-3 = -6-5/-2-3
    y-5/x-3 = -11/-5
    y-5/x-3 = 11/5
    5(y-5)= 11(x-3)
    5y-25 = 11x-33
    5y-11x = 25-33
    5y-11x = -8 or 11x-5y = 8

    (3b)
    RS= √(X1X2)^2 (y1y2)^2
    √(-2-3)^2 + (-6-5)^2
    √(-5)^2 + (-11)^2
    √25 + 121
    √146
    = 12.08

    [IMG]

    =====================================

    (4a)
    Given: curve; y x^2 - 3x
    gradient ; dy/dx = 2x - 3
    At (2-2), gradient = 2(2) - 3
    4-3 = 1

    (4b)
    Given; y= 1+x^2/1-x^-2
    dy/dx = (1-x^2)(2x) - (1+x^2)(-2x)/(1-x^2)^2
    = (1-x^2)(2x) - (1+x^2)(2x)/(1-x^2)^2
    = 2x(1-x^2 + 1+x^2)/(1-x^2)^2
    = 2x(2)/(1-x^2)^2
    = 4x/(1-x^2)^2

    [IMG]
    =====================================

    (5)
    No of blue balls = 6
    No of red balls = 10

    (i)
    Prob (2 balls of some colour)
    = BB or RR
    Total no of balls = 6+10 = 16
    BB or RR
    (6/16 × 5/15) + (10/16 × 9/15)
    =30/240 + 90/240
    =120/240 = 1/2

    (ii)
    Prob (2 balls of different colours)
    = BR or RB
    = (6/16 × 10/15) or (10/16 × 6/15)
    = 60/240 + 60/240 = 120/240
    =1/2

    [IMG]
    =====================================

    (6a)
    27^(2x+1) × 3^-x = 81^(x-2)/9^(x+2)
    = 3^3(2x+1) × 3^-x = 3^4(x-2)/3^2(x+2)
    =3^6x+3-x = 3^4x-8-2x-4
    5x+3 = 2x - 12
    5x - 2x = -12-3
    3x = -15
    3x/3 = -15/3
    X = -5

    (6b)
    X/x+101 = 11/1000
    Since all the members are in binary, convert all to denary (base 10)
    Xbase2 = Xbase10
    101base2 = (1×2^2)+(1×2^0) = 4+1 = 5base10
    11base2 = (1×2¹)+(1×2raise to power 0) = 2+1 = 3base10

    1000base2 = 1×2^3 = 8base10
    X/X+101 = 11/1000 --> X/X+5 = 3/8
    3(x+5) = 8(x)
    3x+15 = 8x
    15 = 8x - 3x
    15 = 5x
    15/5 = 5/5
    X = 3
    Convert X=3 to base 10 to base 2
    2|3
    2|1R1
    |0R1
    .:. x = 11

    (6c)
    Given that log5 base 10 = 0.699

    and log3 base 10 = 0.477
    10
    Log75 base 10 = log(3×5×5) base 10

    =log(3×5²) base 10

    =log3 base 10 + 2log5 base 10

    =0.477 + 2(0.699)
    = 0.477 + 1.398
    = 1.875
    log75 base 10 = 1.875

    [IMG]
    =====================================

    (7a)
    Given that Y=2x2+7x-6
    To find the gradient of the curve at the point x=3
    dy/dx=4x+7 (at x=3)
    dy/dx=4(3)+7
    dy/dx=19

    (7bi)
    Ade bought 7kg of maize + 4kg of meat=N4240
    Kemi bought 3kg of maize + 5kg meat =N4610
    Let x = 1kg of maize and y=1kg of meat
    Therefore 7x+4y=4240-----(eq1)
    3x+5y=4610---------(eq2)
    Substituting simultaneously
    Multiply eq1 by 3 and eq2 by 7
    21x+12y=12720---eq3
    21x+35y=32270---eq4
    Substract eq3 from eq4
    23y=19550
    23y/23=19550/23=850
    y=850
    Substitute y=850 in1
    7x+4y=4240
    7x+4(850)=4240
    7x=4240-3400
    x=840/7
    =120
    Hence the total cost price per Kg of maize is N120.00 while the total cost per kg of meat is N850.00

    (7bii)
    Total cost of 10kg of maize and 5kg of meat
    =10x+5y
    =10(120)+5(850)
    1200+4250
    =N5450

    [IMG]
    =====================================

    (9)
    Draw the diagram
    Q(34.5°N, 22.3°W)
    P(34.5°N, 38.7°E)
    R(35.4°S, 38.7°E)
    Distance between P and Q along the parallel of latitude
    D = Φ/360 × 2πr
    Where r = RcosΦ
    Φ = 38.7° + 22.3° = 61°
    Q = 34.6°
    R = 6400km
    D = 61/360 × 22/7 ×6400cos34.6
    D =1717760(0.8231)/252
    D = 5,610.66768
    = 5,610km

    (9b)
    |PR|=(34.6+35.4)/360 * 2 *22/7*6400
    =70/360 * 44/7 *6400
    =19712000/2520
    =7820km(3 sf)
    Therefore the shortest distance between P and R = 7820km(3 sf)


    (9c)
    Circumference of the circle of latitude through R = 2πr where r = RcosΦ
    = 2πRcosΦ
    = 2 × 22/7 × 6400cos35.4
    =281600/7(0.8151)
    = 229,532.16/7
    = 32,790.3
    = 32,800km (3 s.f)

    [IMG]

    [IMG]

    =====================================


    (10a)
    DIAGRAM

    (10bi)
    n(cricket only) = 3
    (10bii)
    n(football only) = 10
    (10biii)
    x+10+3+12+12+8+50 = 100
    x+95 = 100
    x = 100 - 95
    x=5
    n(hockey only) = 5

    (10c)
    (2x^2 + 1)dx = [ x^3 + x]^3
    = (3^3 + 3) - (0^3 + 0)
    = 27+3
    = 30

    [IMG]
    =====================================

    (12a)
    TABULATE
    Score : 0-9, 10-19, 20-29, 30-39, 40-49, 50-59, 60-69

    Median: 4.5, 14.5, 24.5, 34.5, 44.5, 54.5, 64.5

    Frequency: 5,8,12,3,5,7,10

    Fx: 22.5, 116, 294, 103.5, 222.5, 381.5, 645

    X^2: 20.25, 210.5, 600.25, 1190.25, 1980.25, 2970.25, 4160.25

    Fx^2: 101.25, 1682, 7203, 2570.75, 9901.25, 20791.75, 41602.5

    Standard deviation(SD)= √(Efx^2/Ef) - (Efx/Ef)^2

    = √(84.8525/50)- (1785/50)^2
    = √1,697.05 - (35.7)^2
    = √1697.05 - 1274.49
    = √422.56
    = 20.6

    (12b)
    The range of 2,8,7,4,5,10,6,3,9,6 = Highest number - lowest number
    = 10-2=8

    [IMG]
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    CHEMISTRY ANSWERS

    CHEM-OBJ
    1-10: ACDBABDEBB
    11-20: ADCCCCBEBA
    21-30: DDDCCCDCAB
    31-40: CBCCDEBBAC
    41-50: EABDDBABDC
    51-60: EBABCDEDEB

    =====================================

    (1)
    [IMG]

    =====================================

    (2ai)
    Photosynthesis

    (2aii)
    Sources of chemical
    - Industrial effluent
    - Laboratory effluent

    (2aiii)
    Unpaired electrons present in the D-orbital of Fe^2+ S-electrons

    (2bi)
    - Pig iron
    - Cast iron
    - Wrought iron

    (2bii)
    - Susceptibility to individual exposure to toxic chemicals
    - Irritation of some body parts when toxic gases are inhaled

    (2ci)
    A - Sulphur
    B - Magnesium
    C - Oxygen
    D - Chlorine

    (2cii)
    The type of bond between B and D is ionic bond

    (2ciii)
    Electronic configuration of C using Spdf notation
    Oxygen = 1s22s22p4

    (2civ)
    - Their hardness increases with increasing ionic charge
    - They have high melting and boiling points

    (2di)

    (2dii)
    - The valency of mercury is +2
    - The valency of lead in PbO2 is +4
    =====================================

    (3ai)
    (i) Physical change
    (ii) Chemical change.
    (iii) Physical change.

    (3aii)
    The periodic law states that atomic mass of element is s periodic function of their chemical properties.

    (3aiii)
    (i) Elements within the same group have the same chemical properties.
    (ii) Elements change gradually from metal to non-metals across the period.
    (iii) The arrangement of elements in a horizontal form is called period while the vertical arrangement is called group

    (3aiv)
    (i) Calciumchloridehypochloridte CaCl(OCl)
    (ii) Calcium hypochlorite Ca(OCl)₂
    (iii) Calcium chloride CaCl₂

    (3bi)
    Avogadro's law states that equal volumes of gases at the same temperature and pressure contain equal number of molecules.

    (3bii)
    0.25mole of Argon = 15cm³
    Mass of one mole of Argon = 40g
    40g = 1 mole
    Xg = 0.25 = 10g
    Hence 10g of Argon = 15cm³
    10g of Neon = 10/20 = 1/2 = 0.5mol will contain 2 × 15cm³ = 30cm³ of gas

    (3ci)
    Fermentation is the breakdown of substance by bacteria, yeasts or microorganisms typically involving effervescence and the evolution of heat.

    (3cii)
    H H
    \ /
    C=C + H₂O
    / \
    H H

    H H
    | |
    <=> C-C-OH
    | |
    H H

    <=> C₂H₄ + H₂O <=> C₂H₅
    =====================================

    (4a)
    (i) This is the point at which the indicator changes colour in a volumetric titration
    (ii) Volume of Acid VA = 25cm^3
    Concentration of Hcl CA = 0.4moldm^3
    Volume of NaoH VB = 20vm^3 , na = 1 , nb = 1

    Using the relation = CAVA/CBVB = na/nb

    0.4*25/CB*20 = 1
    CB = 0.4*28/20 = 10/20 = 0.500
    Concentration of NaoH CB = 0.500moldm^3

    (iii)
    - Methyl orange
    - Phenolphthalein

    (4bi)
    - A compound can only be separated through chemical reactions while mixture can through physical methods
    - The individual components of a compound do not retain their individual properties but the constituents of a mixture still retain their individual properties

    (4bii)
    - NaoH
    - Na2CO3.10H2O

    (4ci)
    - Acids react with bases to form salt and water only as the product
    - Acids ionize in water to form hydrogen ions as the only positive ion.
    - *Acids liberate hydrogen gas when reacted with metals

    (4cii) This is because of the dissolution of Nitrogen oxide NO and sulphur (iv) oxide in water

    (4d)
    (i) A flame is a visible, gaseous part of a fire
    (ii) The source of the fire producing the flame
    - the temperature of the flame
    (iii) Because oxygen supports combustion and combustion of oxidation is involved in almost all activities in the universe
    (iv) Zn(s) + 2Hcl(aq) ----> Zncl2(aq) + H2(g)

    =====================================

    (6ai)
    Ethane does not react with ammonia silver nitrate while Ethyne gives a yellow white precipitate when bubbled through ammonial silver nitrate solution.
    C2H2 + 2AgNO3 --> Ag2C2 + 2HNO3
    Ethene gives no reaction.

    (6aii)
    C₂H₄ + H₂ --> C2H₆

    H H
    | |
    C = C + H₂
    | | Hydrogen
    H H
    Ethene
    H H
    | |
    --> H- C-C -H
    | |
    H H
    Ethane

    (6bi)
    It is not safe for a human to stay in closed garage because the exhaust fumes produced by incomplete combination of petrol would be consumed by the person and which is poisoned. The exhaust gas is CO2. Two third if this gas in one's volume of blood causes death.

    (6bii)
    Relative atomic mass of an element is the ratio of an average mass per atom of an element from a given sample to 1/2 mass of a carbon-12 atom

    (6biii)
    2SO₃ + O₂ ---> 2SO₄
    2 moles of SO₃ replied 1 mole of O₂
    0.25mole of SO₃ gives 0.125moles of O₂.

    No of mole = volume given/molar volume
    Nmole = volume / 22.4
    = 5.6/22.4
    0.25mole of SO₃

    No of mole of O2 = volume /22.4
    0.125 = volume/22.4
    Volume = 2.8dm³ or 2800cm³

    (6ci)
    The importance of NaCl in sopa production is to separate the soap from glycol formed and to aid the solubility of the soap formed

    (6cii)
    (i) It is most effective in removing scom ie they clean effectively.
    (ii) They are non-biodegradable and they harm the environment.

    (6di)
    (i) They are affected by PH
    (ii) They are produced from a source and they have their effect on the target organs.
    (iii) They are Proteinous in nature.

    (6dii)
    Heat disrupts hydrogen bonds and non Polar hydrophobic interactions and also Protein globules tend to uncoil when heated.

    (6diii)
    Denaturation
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    COMMERCE ANSWERS


    Commerce OBJ:
    1-10: CCBBCCBDEC
    11-20: ADDBDAAADD
    21-30: AAADEABCAA
    31-40: BBEDDABAEE
    41-50: BBACACAABC
    51-60: DECCCDABCA

    =====================================

    (1a)
    e-commerce is refers to the buying and selling of goods or services using the internet, and the transfer of money and data to execute these transactions.

    (1b)
    (i)Lower Costs
    (ii)Eliminate Travel Time and Cost
    (iii)Provide Comparison Shopping
    (iv)Provide Abundant Information

    (i)Lower Costs; One of the most tangible positives of e-commerce is the lowered cost. A part of these lowered costs could be passed on to customers in the form of discounted prices

    (ii)Eliminate Travel Time and Cost; It is not unusual for customers to travel long distances to reach their preferred physical store. E-commerce allows them to visit the same store virtually, with just a few mouse clicks

    (iii)Provide Comparison Shopping; E-commerce facilitates comparison shopping. There are several online services that allow customers to browse multiple e-commerce merchants and find the best prices.

    (iv)Provide Abundant Information; the amount of information that can be displayed in a physical store. It is difficult to equip employees to respond to customers who require information across product lines
    =====================================


    (2a)
    (i)Authority of Heads of State and Government.
    (ii)the Council of Ministers
    (iii)the Community Tribunal
    (iv)Community Court of Justice

    (2b)
    (I)to promote cooperation among members.
    (ii)Abolition of trade restrictions and Customs Duties
    (iii)to maintain and enhance economic stability among it members.
    (iv)Harmonization of Agricultural, Economic, Monetary and Industrial Policies
    (v)foster relations among Member States
    (vi)contribute to the progress of members state.
    (vii)integration of members state
    (viii)Harmonization of Agricultural, Economic, Monetary and Industrial Policies.

    =====================================

    (4a)
    Discount House; is a firm that buys, sells, discounts, and negotiates bills of exchange or promissory notes. This is generally performed on a large scale with transactions that also include government bonds and Treasury bills.

    (4b)
    Franchising; is a form of business by which the owner (franchisor) of a product, service or method obtains distribution through affiliated dealers (franchisees).

    (4c)
    kiosk; is a small, stand-alone booth typically placed in high-traffic areas for business purposes. It typically provides information and applications on education etc.

    (4d)
    Mobile shop; is a large vehicle that travels from place to place and from which goods are sold.

    (4e)
    variety store; is a retail store that sells a wide range of inexpensive household goods. Variety stores often have product lines including food and drink, personal hygiene products.

    =====================================

    (9a)
    Market segmentation is the activity of dividing a broad consumer or business market, normally consisting of existing and potential customers, into sub-groups of consumers based on some type of shared characteristics

    (9b)
    (i)Product
    (ii)Price
    (iii)Place
    (iv)promotion.

    (i)Product; This is what you are offering to the market. It is a very important part of the marketing mix as it is what you will use to attract the customers. When developing a product, it is imperative that you come up with a product that solves a certain problem for your target market.

    (ii)Price; There are quite a number of factors that go into determining the price of a product including the operation costs and distribution costs incurred while availing the product to the market. One very important factor that you should never forget though is your target market.

    (iii)Place; Place is a very important factor in the marketing mix. Marketing is all about getting customers for your product. It is thus imperative that you reach out to these customers. To do so, you have to get to where they are.

    (iv)Promoting; the product is all about selling your idea to the customer; showing your customer how the product will be of benefit to them and that it will be good value for their money.
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    Physics OBJ
    1-10: CACABDBECA
    11-20: CCDBBDEECA
    21-30: ECACEDACDB
    31-40: CADBBDCBBC
    41-50: EBCADACDAE
    51-60: CDCBCEDCCB
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    PHYSICS ANSWERS


    (2a)
    (i) Acceleration
    (ii) Velocity

    (2b) MSR = 8.5mm
    VSR = 15mm
    TSR = MSR + VSR
    = 8.5 + 15
    = 23.5mm

    ====================================

    (3i)
    draw the velocity diagram

    (3ii)
    Total distance coverd = 75m
    Total distance = Area of shape water graph

    75m = 1/2(45) * U
    75 = 22.5U
    U = 75/22.5
    U = 3.33m/s

    ====================================

    (4a)
    (i) Nuclear fission
    (ii) Discharge of fossil fuels such as oil, gas and coal to the atmosphere

    (4b)
    h = 1.6m
    V = ?
    g = 10m/s²
    V² = u²+2gh
    V² = 2×10×1.8
    V² = 36m/s
    V = √36
    = 6m/s

    ====================================

    (5)
    U1 = 4m/s
    U2 = 0m/s
    M2 = 60g = 0.6kg
    M1 = ?
    V = 2.5m/s

    Using :
    M1U1 + M2U2 = ( M1 + M2)V

    ( M1*4) + ( 0.6*0) = ( M1 + 0.6) * 2.5
    4M1 = 2.5M1 + 1.5
    4M1 - 2.5M1 = 1.5
    1.5M1 = 1.5
    M1 = 1.5/1.5
    M1 = 1kg

    ====================================

    (10a)
    Surface tension is the attractive force exerted upon the surface molecules of a liquid by the molecules beneath that tends to draw the surface molecules into the bulk of the liquid and makes the liquid assume the shape having the least surface area.

    (10b)
    (i) It is in violation of the Heisenberg Uncertainty Principle. The Bohr Model considers electrons to have both a known radius and orbit, which is impossible according to Heisenberg.
    (ii) The Bohr Model is very limited in terms of size. Poor spectral predictions are obtained when larger atoms are in question


    ====================================

    (11a)
    (i) Negligible mass = Gamma radiation
    (ii) Large Ionization Power = Alpha Particle

    (11b)
    λ=0.693/T½
    λ=0.693/18000
    λ=0.0000385 s-¹


    ====================================

    (12ai)
    The volume of a stone is measured using a measuring cylinder by firstly measuring the volume of water in cylinder (v2) , then the stone is dropped into the cylinder (v2)
    Let v1 = volume of water without stone
    V2 = volume of water and stone.
    Therefore the volume of stone = v2 - v1

    (12aii)
    (i) Nature of the liquid.
    (ii) Volume of the liquid.
    (iii) Shape of the container of the liquid.

    (12bi)
    A body is said to be on dynamic equilibrium if the body is moving continually with a constant acceleration.

    (12bii)
    Draw the diagram

    Fy = 0(at equilibrium)
    Fa + Fb - W1 - W2 = 0
    Fb = W1+W2-Fa ....(1)
    Taking moment about point A
    W1 × 0.02 + W2×0.05 - Fb×0.07 = 0
    0.07Fb = 0.02W1 + 0.05W2
    Fb = 2W1+5W2/7 ...(2)

    (12ci)
    Draw the diagram
    u = 7m/s
    Time of flight = 10s

    Time of flight (T) = 2usinΦ/g
    10 = 2×70sinΦ/10
    140sinΦ = 100
    sinΦ = 100/140 = 0.7143
    Φ = sin-¹(0.7143)
    Φ = 45.58°
    Φ = 46°

    (12cii)
    Maximum height = u²sin²Φ/g
    H = 70²sin²45.58/2×10
    H = 4900×0.7143²/20
    H = 125m
    Maximum height = 125m

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    ENGLISH-LANGUAGE-ANSWERS

    Oral-Obj
    1-10 EDDBDBCBEC
    11-20 AABAEECCAA
    21-30 ABCCCEDCEE
    31-40 ECDEDCDDCB
    41-50 BEDAAAADCA
    51-60 ABBEDABACA


    =====================================

    English-Obj
    01-10: EDECCBABEA
    11-20: EDEAEECAEE
    21-30: AABCBBDDAD
    31-40: BCBADBDDCB
    41-50: EDBCCDBDCA
    51-60: DDABBBBCDB
    61-70: DCCEDBDAEE
    81-90: BCADBBAEAB
    91-100: ECEAACBBAB
    =====================================

    (5a)
    Adult female gorillas being patient and loving while nurturing their young ones and being over protective of their young ones. As human mothers do.

    (5aii)
    the spend hours on end to ensure grooming is done properly. This establish social bond amongst them Just like humans do.

    (5bi)
    Leadership:- the silver back leads the troops, tells them when to eat, sleep, rest etc. He also resolves conflicts amongst the troop.

    (5bii)
    Defence:- he protects the troops against all forms of danger and predators.

    (5c)
    The comparises of the silverback(leader), several younger males called blackbacks and females with there offsprings.

    (5d)
    The indulge in rough plays.

    (5e)
    The importance of grooming to them is that its a time the socialize amongst themselves.

    (5fi)
    Adjectival phrase

    (5fii)
    it's qualified the noun leader

    (5g)
    The nurture them and are willing to step up a fight for them

    (5h)
    (i)fascinating -interesting
    (ii)conflicts - disputes
    (iii) predators - attacks
    (iv) nurturing - Nursing
    (v) forged - imitated
    (vi) bonds - unions
    =====================================

    (6a)
    (i)The fundamental human rights of the children in Nigeria are fully protected by the law and its enforcer
    (ii)Due to poverty the parents sees abusing children as a source of income
    (iii)The quest of every citizen to be rich either by nook or crook

    (6b)
    (i)Child abuse can be eradicated by getting modern technologies like washing machine to perform house chores rather than children.
    (ii)Child abuse can be eradicated by one learning how to do some house chores ourselves
    (iii)Child abuse can be eradicated by hiring a cleaning person to come into our homes once in a weak to help with some chores
    =====================================

    (1)
    The need to empower youth for a better tomorrow is connected both, to the financial elevation as well as increment of the standard of living. Awareness is a key factor for this empowerment, with guidance towards developing a wholesome outlook of life. Youth empowerment in any development is imperative not only for national development of an entire country but also for personal development of an individual. Youth empowerment is pursued by promoting youth rights, youth activism and in community decision making. Empowerment is necessarily a process of inculcating values to equip the learner lead a life that is satisfying to the individual while being in accordance with the cherished values and ideals of the society. At present it is the most effective mean that society possesses
    for confronting the challenges of the future.
    -Here are a few reasons why Youth Empowerment is essential-

    (i)Poverty eradication: Youth empowerment can help reduce the rate of poverty to a significant level. One of the keys to empowering the youth is with skill development. When a youth is equipped with essential skills, he can utilize them to feed, assist others, and even invest for future use, aiding the nation economically. This will in-turncontribute to the increase in employability and add to the GDP of the nation.

    (ii)Good education standard:Empowerment can help youth to understand the importance of education that leads to social improvement of the country. When a youth is empowered, he understands the importance of education and helps uplift the sector, integral for a developing nation such as India. Such empowered youth can donate educational facilities to primary,secondary and even totertiary institutions. Today, India lacks the proper infrastructure for education, which can easily be brought into existence only through empowerment.

    (iii)Crime reduction: Empowerment ensures that youth has the necessary skill to sustain a livelihood, preventing him to adopt the path of crime. Presently, a lot has been spent in the name of fighting crime without understanding that crime affects the youth in an intrinsic level. It is easy for a young impressionable mind to get waylaid and get entrapped in anti-social activities because he was not empowered morally, academically as well as financially. There are serious social and economic consequences associated with not addressing the youth who is at the risk of negative circumstances not only for the youth himself and his family, but also for the society at large.

    In today’s day and age, young minds should have access to resources to transform their consciousness through their beliefs, values, and attitudes. Then only can we believe in making our nation “shine”, even in times of adversity.
    =====================================

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