Heat And Thermodynamics QUESTIONS AND ANSWERS

IIT JEE : Heat And Thermodynamics QUESTIONS AND ANSWERS :: part3 : 6 to 10

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

6.When an ideal diatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas is

2 / 5

3 / 5

3 / 7

5 / 7

7.A gas at NTP is slowly compressed to one-fourth of its original volume. Then final pressure is

4 atmosphere

0.75 atmosphere

8 atmosphere

0.25 atmosphere

8.A vessel containing 5 litre of a gas at 0.8 m pressure is connected to an evacuated vessel of volume 3 litre. The resultant pressure inside will be (assuming whole system to be isolated)

4/3 m

0.5 m

2.0 m

� m

9.The thermal conductivity of copper decreases significantly as the temperature is increased. This is because, at higher temperatures,

ionic forces between copper atoms decrease

lattice vibrations travel more slowly

fewer conduction electrons are present

the distance between copper atoms increases

10.In the case of diatomic gas, the ratio of energy used for expansion and the heat supplied at constant pressure is

2 / 5

3 / 7