Theory of consumer behaviour — Economics STD 12 Humanities & Commerce — Question

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 statements are true or false.
Income from imputed rent of self occupied houses is a part of national income.

State giving reasons, whether the following statements are true or false:
When there are diminishing returns to a factor, Total Product first increases and then starts falling?

Macroeconomics is the study of individual and small group of individuals.

In macroeconomics, aggregate demand refers to planned purchase of goods and services during a year. (True/ False)

"To make the minimum price ceiling effective, it must be accompanied by rationing". True/ False. Justify your answer.

Giving reasons, state whether the following statements are true or false.
Under monopoly all firms can sell at any price.

Giving reasons, state whether the following statement are True or False.
If supply curve touches Y-axis, elasticity of supply is less than one?

Giving reasons, state whether the following statements are true or false.
An indifference curve (IC) is convex to the origin because of increasing MRS_xy.

Giving reasons, state whether the following statements are true or false.
Real GDP includes domestic income at current prices.