The given figure represents the arrangement of molecules in different states of matter :

Which of the following statements are correct?
I. Processes P, Q, R, S and T, all are reversible.
II. Processes P, Q and S involve absorption of energy.
III. Processes R, S and T involve evolution of energy.
IV. Process P represents process S + process Q.

Options

A. I and III only
B. I and IV only
C. II and IV only
D. I , II and IV only

Answer

D

Explanation

Sublimation (P), vaporisation (Q), condensation (R), melting (S) and freezing (7), all are reversible processes.
Sublimation (P),vaporisation (Q) and melting (S) involve absorption of energy while condensation (R) and freezing (7) involve evolution of energy.
Sublimation (P) = Melting (S) + Vaporisation (Q)