The theory of the firm under perfect competition — Economics STD 12 Humanities & Commerce — Question

Giving reasons, state whether the following statements are true or false:
When MR is zero, average revenue will be constant.

Giving reasons, state whether the following Its are true or false.
When marginal cost rises, average cost will also rise.

Giving reasons, state whether the following statement are True or False.
Ceteris paribus, if price rises, quantity supply of goods will fall.

Income effect of inferior good is positive. (True/ False)

Giving reasons, state whether the following statements are true or false.
When the quantity of a variable input is increased from 4 to 6 units, the total output increases from 85 units to 105 units. The marginal product of the variable input is 20 units.

Giving reasons, state whether the following Its are true or false.
Total Cost rises only when marginal cost rises.

Giving reasons, state whether the following statements are true or false.
If Indian Airlines reduce fares from Delhi to Mumbai, demand curve for air travel shifts rightward.

AR curve always remain above MR curve. (True/ False)

Giving reasons, state whether the following statement are true or false.
If marginal revenue is equal to the total cost, producer is in equilibrium.

National Income is studied under Macroeconomics. (True/ False)