Correct Answer: B. law of diminishing returns

Explanation

Law of diminishing returns also known as law of variable proportion is used to determine. The shape of the PPF.

Correct Answer: A. Aufbau Principle

Explanation

(a)(i) Covalent bond and dative or co-ordinate covalent bond.

(ii) The characteristics are:

—They have high melting point or boiling point.

—They conduct electricity when molten or in solution

—They exist as aggregates of ions

—They are soluble in polar solvent e.g water and insoluble in non-polar solvents

(iii) State two differences between chemical reactions and .

b)(i) 1s\(^2\)2s\(^2\)2P\(^2\)

(ii) Group (II) or alkaline earth metal

(iii) YX\(_2\)

(iv) X is a good oxidizing agent because its outer shell contains seven electrons, it therefore accepts one electron to form an octet structure. From the efinition of an oxidizing agent, oxidizing agents are good acceptors of electrons.

(v) Y (1s\(^2\)2s\(^2\)2p\(^6\)3s\(^2\)) would be expected to form a basic oxide because Y is a metal or Y is an electropositive element.

c)(i) \(^{14}_6C\) \(\to\) \(^0_1X\)+ \(^{14}_7N\)

X is a beta particle

(ii) \(^{14}_7N\) + \(^4_{-1}Y\) \(\to\) \(^1_1H\) + \(^{17}_8O\)

Y is an alpha particle

d)(i) Metals are zinc, potassium and mercury

(ii) Compounds that are gases at room temperature are carbon (IV) oxide and methane

(iii).Non-metal that is solid at room temperature is sulphur. ,

Correct Answer: A. recklessness

Correct Answer: B. total assets and current liabilities

Correct Answer: D. appendix

Correct Answer: C. Error of transposition

Correct Answer: B. offering vain sacrifices

Correct Answer: C. show that no one is above temptation

Explanation

(a) Meaning of agricultural insurance: It is a risk management mechanism put in place to compensate farmers for losses due to natural calamities such as floods, drought and outbreaks of pests and diseases or due to declines in the prices of agricultural commodities.

b) Explanation of types of insurance policies for agricultural production

(i) Specific enterprise insurance: This is an insurance policy that covers a particular farming enterprise e.g. crop insurance, livestock insurance. It protects farmers against loss of crops/livestock due to disasters or calamities

(ii) Fire disaster insurance: It is an agricultural insurance policy which protects the farmer against losses due to fire outbreak

(iii) Life assurance: This covers the farmer, farm workers and farmer's household in the event of death

(c) Process of egg formation in a hen

- The yolk is formed in the ovary and released into the infundibulum

- Fertilization of the egg occurs in the infundibulim

- The egg spends fifteen minutes in the infundibulum before it moves into the magnum

- The egg stays for three hours in the magnum where part of the albumen is secreted on the yolk and chalaza is formed before it passes into the isthmus

- The shape of the egg and the two shell membranes are formed in the isthmus within seventy-five minutes before it passes into the uterus

- In the uterus, the egg stays for nineteen to twenty hours and the shell is formed and minerals are also added to the egg before it passes into the vagina

- The egg stays shortly in the vagina before it is then laid through the cloaca