Home
Class 11
PHYSICS
Assertion: In adiabatic expansion, tempe...

Assertion: In adiabatic expansion, temperature of gas always decreases.
Reason: In adiabatic process exchange of heat is zero.

A

(a) If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

B

(b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

C

(c) If Assertion is true, but the Reason is false.

D

(d) If Assertion is false but the Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
B
`Q=0`, `DeltaU=-W`
In expansion, W is positive. So, `DeltaU` is negative. Hence, T also decreases.
Promotional Banner

Topper's Solved these Questions

  • LAWS OF THERMODYNAMICS

    DC PANDEY|Exercise Level 1 Objective|14 Videos

  • LAWS OF THERMODYNAMICS

    DC PANDEY|Exercise Level 1 Objective Questions|1 Videos

  • LAWS OF THERMODYNAMICS

    DC PANDEY|Exercise Exercise 21.4|8 Videos

  • LAWS OF MOTION

    DC PANDEY|Exercise Medical entrances gallery|39 Videos

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    DC PANDEY|Exercise Integer type Questions|10 Videos

Similar Questions

Explore conceptually related problems

In an adiabatic expansion

In adiabatic expansion of a gas

Assertion In adiabatic expansion the product of p and V always decreses Reason In adiabatic expansion process, wrok is done by the gas at the cost of internal energy of gas.

An adiabatic expansion of an Ideal gas always has

An adiabatic expansion of an ideal gas always has

These question consists of two statements each, printed as Statement-I and Statement-II . While answering these Question you are required to choose any one of the following four responses. Statement -I : Due to adiabatic expansion , temperature of an ideal gas always decreases. Statment -II : For an adiabatic expansion DeltaU =W .

Statement-1: Due to adiabatic free expansion temperature of real gas may increase. Statement-2 : In adiabatic free expansion, temperature is always constant irrespective of real or ideal gas

In an adiabatic expansion of an ideal gas -

Assertion: In adiabatic compression, the internal energy and temperature of the system get decreased. Reason: The adiabatic compression is a slow process.