Question

Match the column $I$ with column $II$ and mark the appropriate choice.

Column I		Column II
(A)	$CH_{4\left(g\right)} + 2O_{2\left(g\right) }\to CO_{2\left(g\right)}+ 2H_{2}O$	(i)	$\Delta_{sol}H^{\circ}$
(B)	$H_{2\left(g\right) }\to 2H_{\left(g\right)}$	(ii)	$\Delta_{lattice}H^{\circ}$
(C)	$NaCl_{\left(s\right)} ^{ }\to Na^{+}_{\left(g\right)}+Cl^{-}_{\left(g\right)}$	(iii)	$\Delta_{c}H^{\circ}$
(D)	$NaCl_{\left(s\right)} ^{ }\to Na^{+}_{\left(aq\right)}+Cl^{-}_{\left(aq\right)}$	(iv)	$\Delta_{bond}H^{\circ}$

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

Answer 1

Answer: (D)

$(A) : CH_{4(g)} + 2O_{2(g)} \to CO_{2(g)} + 2H_2O$
shows combustion reaction.
$(B) : H_{2(g)} \to 2H_{(g)}$ shows bond dissociation.
$(C) : NaCl_{(s)} \to Na^+_{(g)} + Cl^-_{(g)}$
shows dissociation of $NaCl$.
$(D) : NaCl_{(s)} Na^+_{(aq)} + Cl^-_{(aq)}$
snows dissolution of $NaCl$.