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

Giving reasons, state whether the following statement are True or False.
When price of factor input falls, supply curve shifts rightward.

Giving reasons, state whether the following statement are True or False.
If there is decrease in supply, producer moves downward along the same supply curve?

State giving reasons, whether the following statements are true or false:
Marginal Revenue is always the price at which the last unit of the commodity is sold.

Giving reasons, state whether the following statements are true or false.
Money supply is a stock concept.

Main tools of Macroeconomics are demand and supply.

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

Giving reasons, state whether the following statements are true or false:
If the supply curve is a vertical straight line, change in demand will not affect equilibrium price.

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.

Change in quantity demanded is the explanations of law of demand. (True/ False)

Are the following statements true or false? Give reasons.
Direct tax are generally 'Proportional in nature.