Assertion (A): Spontaneous process is an irreversible process and may be reversed by some external agency.
Reason (R): Decrease in enthalpy is a contributory factor for spontaneity.
(i) Both A and R are true and R is the correct explanation of A.
(ii) Both A and R is true but R is not the correct explanation of A.
(iii) A is true but R is false.
(iv) A is false but R is true
Assertion (A): Spontaneous process is an irreversible process and may be reversed by some external agency.
Reason (R): Decrease in enthalpy is a contributory factor for spontaneity.
(i) Both A and R are true and R is the correct explanation of A.
(ii) Both A and R is true but R is not the correct explanation of A.
(iii) A is true but R is false.
(iv) A is false but R is true
This is a Assertion and Reason Type Questions as classified in NCERT Exemplar
Ans: (ii)
Explanation: The energy factor for a spontaneous process should be favourable (i.e., -ve) and the randomness should be positive.
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Chemistry NCERT Exemplar Solutions Class 11th Chapter Six 2025
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