Explanation

(a) (i) Nuclear fission: is the splitting of a heavy atomic nucleus into two approximately equal fragments, with evolution of large amount of energy. Use of nuclear fission: It is used for generating large amount of energy.

(ii) Nuclear fusion: Is the process whereby two light nuclei combine to form a heavier nucleus with energy generated or released. Use of nuclear fusion: It is used for generated radioactive isotopes.

(b) \(^{235}_{92}U \to ^{231}_{90}A + ^4_2\alpha\)

\(^{231}_{90}U \to ^{231}_{91}\beta + ^0_{-1}\alpha\)

\(^{231}_{91}B \to ^{227}_{89}AC + ^4_2\alpha\)

Accept \(^{4}_{2}\)He as \(\alpha\)—particle and \(^o_{-1}e\) as \(\beta\)— particle

(c) Model I: Obeys Aufbaus and Hund's, violates Pauli's Exclusion Principle. Model II: Obeys all the three rules i.e Hund, Aufbaus and Pauli.

(d) In general, the higher the molar mass, the higher the boiling point. Oxygen is more electronegative than sulphur. H\(_{2}\)O molecules are held together by stronger hydrogen bond than in H\(_2\)S. Hence, more energy is required to break the hydrogen bond in water.

(e)(i)HCI in water turns blue litmus to red. HCI in methyl benzene has no effect on blue litmus paper.

(ii) The methyl benzene solution does not conduct electricity while HCI in water conducts electricity.

(f) (i) Drown precipitate is observed and the blue colour fades

(ii) The reaction is a redox or displacement Solids reaction. Gases

Correct Answer: D. \(-1 \leq r \leq 1\)

Explanation

(a)Insurance underwriter: An underwriter is one who insures against marine and other risks. He gives his name to an insurance policy as a guarantee of payment of a specified amount in the event of a loss. Underwriters usually operates in syndicates. Members who take the greatest part of the risks are referred to as leading underwriters.

(b)Promoters: They are people who form or float a public limited liability company and establish it as a going concern. Promoters are a class of people skilled in dealing with the preliminaries necessary to the formation of a company and who possess expert knowledge of the investing public. Promotes stand in a trust position to the company they promote and must not derive any personal gain from the work of promotion without first disclosing the fact to independent representatives.

(c)Auctioneer: This is a person licensed by the government to sell movable and immovable properties at a public auction. He sells through bidding for prices and earns commission for his services. He has a right of lien over the properties he has in his possession until payment and commission are paid. He must sell to the highest bidder

(d)Factors: He is a person who has in the ordinary course of his duties, authority to sell goods or cosign goods for the purpose of sale or to buy goods or to raise money for the security of the goods in his possession etc. A factor has a greater power than an ordinary agent. He also has right of lien for any amount due to him on the goods he holds for his principal.

(e)Broker: This is a person who acts as an agent on behalf of a principal. A broker does not take title to goods he deals in. He takes commission known as brokerage. He brings together those who intend to buy or sell.

Correct Answer: A. skull and vertebral column

Explanation

i. A system of electing and replacing government.

ii. Popular participation by citizens in government.

iii. Practice of rule of law.

iv. Multi-party system

v. Majority rule

vi. Supremacy of the constitution.

vii. Seperation of powers/checks and balances

viii. Free, fair and periodic elections.

ix. Supremacy of the constituition.

Correct Answer: B. a system of farming in which crops are provided with water artificially

Correct Answer: C. Kidneys

Correct Answer: A. the debt of a company can only be paid from its own assets

Correct Answer: B. blocks the bile duct and reduces secretion of bile

Correct Answer: D. exonerate

Explanation

castigate; to reprimand or scold (someone) severely of a blame.

exonerate; to clear, free or absolve (someone) from blame for a fault or wrongdoing.