Question

Match the following columns and mark the appropriate choice.

Column I		Column II
(A)	Exothermic	(i)	$\Delta H = 0$, $\Delta H = 0$
(B)	Spontaneous	(ii)	$\Delta G = 0$
(C)	Cyclic process	(iii)	$\Delta H$ is negative.
(D)	Equilibrium	(iv)	$\Delta G$ is negative.

• A. $(A) \to (ii)$, $(B) \to (iii)$, $(C) \to (i)$, $(D) \to (iv)$
• B. $(A) \to (iv)$, $(B) \to (i)$, $(C) \to (iii)$, $(D) \to (ii)$
• C. $(A) \to (i)$, $(B) \to (ii)$, $(C) \to (iv)$, $(D) \to (iii)$
• D. $(A) \to (iii)$, $(B) \to (iv)$, $(C) \to (i)$, $(D) \to (ii)$

Answer 1

Answer: (D)

The Gibb's free energy change $(\Delta G )$ is:
$\Delta G < 0 \longrightarrow $ Spontaneous process
$\Delta G >0 \longrightarrow $ Non-spontaneous process
$\Delta G =0 \longrightarrow $ Equilibrium process
Also, $\Delta H >0 \longrightarrow $ Endothermic process
$\Delta H <0 \longrightarrow $ Exothermic process
For a cyclic process, all the state functions are equal to zero.
So, $\Delta H =0, \Delta E =0$ for all cyclic process.