Question

Assertion : Thermodynamic process in nature are irreversible.

Reason : Dissipative effects cannot be eliminated.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (a) Both A and R are true and R is the correct explanation of A

Explanation :

In an irreversible process, there always occurs some loss of energy. This is because energy spent in working against the dissipative force is not recovered back. Some irreversible processes occur in nature such as friction where extra work is needed to cancel the effect of friction. Salt dissolves in water but a salt does not separate by it self into pure salt and pure water.