PHYSICS
Section-A
Q.1) If R = universal gas constant, the amount of heat needed to raise the temperature of 2 mol
of an ideal monatomic gas from 273 K to 373 K when no work is done is
(1) 100R
(2) 150R
(3) 300R
(4) 500R
Answer: 300R
Q.2) Two samples A and B of a gas initially at the same pressure and termperature are
compressed from volume V to 1/2 (A isothermally and B adiabatically). The final pressure of A is
(1) greater than the final pressure of B
(2) equal to the final pressure of B
(3) less than the final pressure of B
Ok(4) twice the final pressure of B
Answer: less than the final pressure of B
Q.3) The temperature of 5 mol of a gas which was held at constant volume was changed from
100°C to 120°C The change in internal energy was found to be 80 J. The total heat capacity of
the gas at constant volume will be equal to
(1) 8JK-¹
(2) 0.8JK-¹
(3) 4JK-¹
(4) 0.4JK-¹
Answer: 4JK-¹
Q.4) Twenty-two grams of CO2 at 27°C is mixed with 16 g of O2 at 37°C. The temperature of
the mixture is about
(1) 31.5°C
Section-A
Q.1) If R = universal gas constant, the amount of heat needed to raise the temperature of 2 mol
of an ideal monatomic gas from 273 K to 373 K when no work is done is
(1) 100R
(2) 150R
(3) 300R
(4) 500R
Answer: 300R
Q.2) Two samples A and B of a gas initially at the same pressure and termperature are
compressed from volume V to 1/2 (A isothermally and B adiabatically). The final pressure of A is
(1) greater than the final pressure of B
(2) equal to the final pressure of B
(3) less than the final pressure of B
Ok(4) twice the final pressure of B
Answer: less than the final pressure of B
Q.3) The temperature of 5 mol of a gas which was held at constant volume was changed from
100°C to 120°C The change in internal energy was found to be 80 J. The total heat capacity of
the gas at constant volume will be equal to
(1) 8JK-¹
(2) 0.8JK-¹
(3) 4JK-¹
(4) 0.4JK-¹
Answer: 4JK-¹
Q.4) Twenty-two grams of CO2 at 27°C is mixed with 16 g of O2 at 37°C. The temperature of
the mixture is about
(1) 31.5°C
