Correct Answer: B. The labour force

Correct Answer: d) Television

Correct Answer: A) Ethyne

Explanation

Ethyne, also known as acetylene, is the correct answer because it undergoes addition reactions due to the presence of a triple bond between the two carbon atoms. The triple bond in ethyne consists of one sigma bond and two pi bonds. In addition reactions, the pi bonds break and new atoms or groups of atoms are added to the carbon atoms, resulting in a more saturated compound.

On the other hand, butane and pentane are alkanes, which have only single bonds between the carbon atoms. Alkanes are saturated hydrocarbons, and they do not readily undergo addition reactions. Instead, they typically undergo substitution reactions.

Ethanol is an alcohol, meaning that it has a hydroxyl group (-OH) attached to a carbon atom. Alcohols mainly undergo substitution and elimination reactions, but not addition reactions.

Tetrachloromethane, also known as carbon tetrachloride, is a compound with four chlorine atoms bonded to a central carbon atom. This compound is already saturated and does not undergo addition reactions.

In summary, ethyne is the only compound among the given options that undergoes addition reactions due to the presence of the triple bond.

Correct Answer: D) cyclohexane

Correct Answer: C. III & IV

Correct Answer: D. Bowman's capsule

Correct Answer: C) another good may have been purchased instead of it

Explanation

In economics, a commodity refers to a good or service that is traded in the market. An opportunity cost refers to the cost of an alternative that must be forgone in order to pursue a certain action. Therefore, a commodity is said to have an opportunity cost because choosing to consume or purchase it means that an individual must give up the opportunity to consume or purchase another good.

The question asks why a commodity has an opportunity cost and presents four options to choose from. Option A suggests that a commodity has an opportunity cost because the price of the commodity is high, but this is incorrect. The price of a commodity does not determine its opportunity cost.

Option B suggests that a commodity has an opportunity cost because it is scarce. While scarcity may affect the price of a commodity, it does not necessarily mean that the commodity has an opportunity cost.

Option C is the correct option. It suggests that a commodity has an opportunity cost because choosing to consume or purchase it means that an individual must give up the opportunity to consume or purchase another good.

Option D suggests that a commodity has an opportunity cost because it provides many benefits. However, this does not necessarily imply that the commodity has an opportunity cost.

To summarize, a commodity has an opportunity cost because choosing to consume or purchase it means that an individual must give up the opportunity to consume or purchase another good.

Correct Answer: D. Copper alloy

Explanation

(a)A slow but steady rise in the prices of goods and services in general is known as creeping inflation. On the other hand, when the rise in the prices of goods and services in general is persistent and rapid, it is known as hyper-inflation.

(b) Negative effects of inflation:

(i) it discourages savings

(ii) it discourages production and encourages buying and selling

(iii) fixed income earners suffer

(iv) the value of money falls

(v) standard of living falls

(vi) it makes planning difficult e.g. Government proposed expenditure is increased

(vii) it causes balance of payments prob-lems.

(c) Some of the ways in which the government can control inflation are:

(i)government can use contractionary monetary policies to reduce money supply in order to reduce aggregate demand;

(ii) Government can use fiscal policy (tax policy) to reduce household and business incomes in order to reduce aggregate demand.

(iii) Government can reduce its expenditure in order to reduce aggregate demand.

(iv) Government can budget for a surplus and so reduce aggregate demand.

(v) Government can grant subsidies to producers to increase production.

(vi) Government can discourage importation from countries suffer-ing from inflation.

(vii) Government can improve infrastructure to stimulate production.

Correct Answer: D. reality of war