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WAEC GCE 2022 CHEMISTRY PRACTICAL ANSWERS

Posted by on November 8, 2022 0

INSTRUCTIONS

(2)

In addition to the fittings and reagents normally found in a chemistry laboratory, the following apparatus and materials will be required by each candidate.

(a) One Burette of 50cm3 of capacity

(b) One pipette, either 20cm3 or 25cm3 (All candidates at one center must use pipettes of the same volume, these should be clean and free from grease).

(c) The usual apparatus for titration

(d) The usual apparatus and reagents for qualitative work including the following with all reagents appropriately labeled:

(i) 10% dilute sodium hydroxide solution

(ii) dilute hydrochloric acid

(iii) dilute trioxonitrate(v) acid

(iv) silver trioxonitrate(v) acid

(v) acidified potassium dichromate solution

(vi) aqueous ammonia

(vii) lime water

(viii) red and blue litmus paper

(ix) dilute tetraoxosulphate(vi)

(x) aqueous barium chloride

(e) Spatula

(f) Filtration apparatus,

(g) One beaker

(h) One boiling tube

(i) Four test tubes

(j) Starch solution indicator

(k) Glass rod

(l) Wash bottle containing distilled/deionized water,

(m) Burning splint,

(n) Watch glass

(o) Bunsen Burner/source of heat

(p) Droppers

(3)

(a) 150cm3 of iodine solution in a corked flask or bottle labeled ‘An’. These should all be the same containing 25.4g of I2 in 6.0g kl per dm3 of solution.

(b) 150cm3 of sodium thiosulphate pentahydrate solution in a corked flask or bottle labeled ‘Bn’. These should all be the same containing 24.82g of Na2S2O3 per dm3 of solution.

(c) One spatulaful of ammonium ferrous sulphate, (NH4)2Fe(SO4)2.6H2O in a specimen bottle labeled ‘Cn’.

This must be the same for all candidates.

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*Monday, 6th June, 2022*

Applied Electricity 3 (Practical)

09:30am – 12:30pm (1st Set)

Applied Electricity 3 (Practical)

1:00pm – 4:00pm (2nd Set)

Basic Electricity 3 (Practical)

09:30am – 12:30pm (1st Set)

Basic Electricity 3 (Practical)

1:00pm – 4:00pm (2nd Set)

Visual Art 3A (Drawing)

2:00pm – 5:00pm

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

*Tuesday, 7th June, 2022*

Economics 2 (Essay)

09:30am – 11:30am

Economics 1 (Objective)

11:30am – 12:30pm

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*Wednesday, 8th June, 2022*

Christian Religious Studies 2 (Essay)

09:30am – 11:30am

Christian Religious Studies 1 (Objective)

11:30am – 12:30pm

Islamic Studies 2 (Essay)

09:30am – 11:30am

Islamic Studies 1 (Objective)

11:30am – 12:20pm

Chemistry 2 (Essay)

2:00pm – 4:00pm

Chemistry 1 (Objective)

4:00pm – 5:00pm

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And the cable is easily fitted in the monitor and the other end is fixed in the CPU of a computer system.

*_(iii)_* DVI cable: DVI cables are used to connect the LCD monitor and the video card. Using this cable, the user can see high image quality without having any disturbance. The DVI cable is mostly used in CRT monitors, which have a VGA connection. This cable transmits the digital and analog signals to the computer system.

*_(iv)_* Ethernet Cable: The Ethernet cable is a type of computer network cable which is used for a wired network. The Ethernet cable is used to connect the switches, monitors, PCs to the LAN (Local Area Network). The length and durability of the Ethernet cable describe the quality of the connection.

*_(v)_* PS/2 Cable: The PS/2 cable is a standard cable to connect the mouse and keyboard to the computer system. The length of the PS/2 cable is long enough so that the user can easily connect the mouse and keyboard to the system and use the system. There are a total of 6 pins in PS/2 cables and have a round connector. There are majorly two sizes of PS/2 cable. The smaller size is the most common cable, but some adaptors can be used to convert it into a larger size.

*_(vi)_* 5mm Audio Cable: The 3.5mm audio cables are a type of computer cables that are used in computer audio applications. This cable can be used for connecting a mini-stereo audio device, PC sound card or any portable CD player to any multimedia speaker. This cable can also be used to connect earphones and headphones to the system.

(ii)Teaching political education in schools: The introduction of political education into the school curriculum like the learning of civic education, government, diplomacy and other political thoughts at all levels of education can help improve the public service in Nigeria. The political education would go a long way to reorienting Nigerian youths from the cradle who is potential leaders of tomorrow.

(iii)Use of code of conduct bureau and public complaints commission Government should establish some disciplinary codes of conduct which will watch the affairs of public servants.The Code of Conduct Bureau is empowered by the constitution to support the Federal Government in curtailing unethical conduct, abuse of office, and other forms of corruption in the public service.

(iv)Encouraging citizen to participate in governance: The quality of service rendered by public services will be much better if citizens participated in governance and have platforms on which to express grievances and give feedback. This participatory governance helps to encourage accountability because it puts members and managers of public enterprises on their toes.

(v)improved salaries: The most important input in the public service is human resources. If the people who work and provide services on behalf of the government are not well motivated, there will continue to be a poor quality of work and poor national development. In Nigeria, public servants are the least motivated to work because of their low salary and remuneration package.

(vi) Introducing the use of technology in the public service: The public sector in Nigeria still makes use of traditional ways in performing their functions. It is very difficult for the public sector to catch up with standards in a fast-paced technological world. The government needs to invest in Information and technological tools in order to improve the quality of services.

*_By official Crackerjack_*

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*++++++++++++++++++++++++++++++*

*NECO CIVIC EDUCATION*

*SECTION A*

*NUMBER FOUR*

(4a)

(i) Road Accidents:

Many roads accident are caused by drivers who drink and drive, or those under the influence of drugs.

(ii) Social vices and problems:

People found under the influence of drugs can engage in social vices like rape, cultism, robbery , fraud , terrorism, etc, thereby causing more problems for government or the entire society.

(iii) Hooliganism and violence:

Many people who engage in abuse if drugs end up becoming touts, wayward and destitutes, thereby creating more problems and expenses for the government and the society at large

(iv) Waste of government funds:

Government spends more on the building of psychiatric hospital to cure those who are insane. Money is also often spent on adverts and symposia on the implications of drug abuse.

(v) Broken Homes:

Someone who abuses drugs may end up in disastrous acts of different kinds which may end up destroying and forcing family members into having broken homes.

*_By Official Crackerjack_*

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*++++++++++++++++++++++++++++++++*

*_(5a)_*

Civic duty means the patriotic and ethical duties of all citizens to take an active role in society and to consider the interests and concerns of other individuals in the community.

*_(5b)_*

i. Loyalty to the State: Loyalty entails that every citizen shall obey the laws of the land. Every citizen in a state who is up to age and who is employed should pay taxes and rates as and when due.

ii. Military Service: Citizens are bound to defend their country in time of war. Every Nigeria citizen is bound to perform military service for the defense of the country against enemy attack whenever he is called to do so.

iii.Voting in an Election: Another duties and obligations of a citizen involves voting in an election. Citizens are duty bound to vote during an election for the selection of qualified leaders of the state.

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