Home
Class 11
CHEMISTRY
Assertion : An exothermic process which ...

Assertion : An exothermic process which is non-spontaneous at high temperature may become spontaneous at low temperature.
Reason : Spontaneous process is an irreversible process and may be reversed by some external agency.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaG=DeltaH-TDeltaS`
For exothermic process, `DeltaH=-ve`. For `DeltaG` to be `-ve` (for spontaneous process), `DeltaH gt T DeltaS` which is possible only at low temperature.
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    NCERT FINGERTIPS|Exercise NCERT Exemplar|11 Videos

  • THE S-BLOCK ELEMENTS

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

For a spontaneous process,

For a spontaneous process.

An endothermic process is non-spontaneous at some temperature. It can be spontaneous at………….temperature.

For spontaneous process:

Assertion (A): An exothermic process, non-spontaneous at high temperature, may become spontaneous at low temperature. Reason (R ) : With decrease in temperature, randomness (entropy) decreases.

Spontaneity of a process

The criterior for a spontaneous process is

The criterion for a spontaneous process is