Question

Match the column I with column II. Note that column I may have more than one matching options in column II

Column I	Column II
(A) Reversible adiabatic compression	(p) ∆ Ssystem> 0
(B) Reversible vaporisation	(q) ∆ Ssystem< 0
(C) Free expansion of ideal gas in vacuum	(r) ∆ Ssurrounding<0
(D) Dissociation of CaCO3 (s) → CaO(s) + CO2 (g)	(s) ∆ Ssurrounding=0

Answer 1

Correct option A → s; B → p, r; C → p, s; D → p, r

Explanation:

Irreversible adiabatic compression 

(A) Q = 0, 

∴ ∆S_surr = 0, ∆S_system = 0  

(B) Reversible vap

∆S_system > 0

as gaseous Reversible, process 

∴ ∆S_total = 0

 ∆S_surr < 0

(C) free expansion of ideal gas