Question

An ideal gas undergoes four different processes from the same initial state (figure). Four processes are adiabatic, isothermal, isobaric and isochoric. Out of 1, 2, 3 and 4 which one is adiabatic.

Options

• 4

• 3

• 2

• 1

Answer 1

2

Explanation:

For curve 4 pressure is constant, so this is an isobaric process.

For curve 1, volume is constant, so it is an isochoric process. Between curves 3 and 2, curve 2 is steeper, so it is adiabatic and 3 is isothermal.