(i) the area under the curve must not change with an increase in temperature.

(ii) the area under the curve increases with increase in temperature.

(iii) the area under the curve decreases with increase in temperature.

(iv) with the increase in the temperature, curve broadens and shifts to the right-hand side.

Correct Answers:

(i) the area under the curve must not change with an increase in temperature.

(iv) with the increase in the temperature, curve broadens and shifts to the right-hand side.

Explanation: In the graph showing Maxwell Boltzman distribution of energy, the area under the curve must not change with an increase in temperature and with the increase in the temperature, curve broadens and shifts to the right-hand side.