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:
$\Delta G<0⟶$ Spontaneous process
$\Delta G>0⟶$ Non-spontaneous process
$\Delta G=0⟶$ Equilibrium process
Also, $\Delta H>0⟶$ Endothermic process
$\Delta H<0⟶$ 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.