Question

Assertion: Salt such as NaCl dissolves, the Na⁺ and Cl^- ions leaving the crystal lattice acquire far greater freedom. 

Reason: ln thermodyanamic terms, the formation of solution occurs with a favourable change in free energy, i.e., ΔH has a high positive value and TΔS a low negative value.

(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  (c) A is true but R is false

Explanation:

In thermodynamic terms. formation of solution occurs with a favourable change in free energy

ΔG= ΔH - TΔS

where ΔH has a small positive value and TΔS a large positive value; thus, ΔG is negative.