Question

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

	Column I		Column II
(A)	$K_{p}$	(i)	Almost neutral, pH > 7 or <7
(B)	$0.5$	(ii)	Acidic, pH < 7
(C)	$0.01$	(iii)	Alkaline, pH > 7
(D)	$0.05$	(iv)	Neutral, pH = 7

• A. (A)$0.1$ (i), (B) $K_{P}$ (ii), (C) $K_{p}$ (iii), (D) $NH_{4}HS_{(s)}$ (iv)
• B. (A) $NH_{3(g)} + H_{2}S_{(g)}$ (ii), (B) $1.12$ (iii), (C) $105^{o}C$ (iv), (D) $105^{o}C$ (i)
• C. (A) $1.12atm$ (iii), (B) $0.56$ (ii), (C) $1.25$ (iv), (D) $0.31$ (i)
• D. (A) $0.63$ (iv), (B) $NH_{4}COONH_{2(s)}$ (i), (C) $2NH_{3(g)} + CO_{2(g)},$ (iii), (D) $K_{P}$ (ii)

Answer 1

Answer: (C)

(A) $1.12atm$ (iii), (B) $0.56$ (ii), (C) $1.25$ (iv), (D) $0.31$ (i)

Answer 2

: (1)$CH_{3}COONa$ $\underset{Weakacid}{CH_{3}COO^{-}} + \underset{Strongbase}{Na^{+}}$ (Basic),

(2) $NH_{4}Cl$ $\underset{Weakbase}{NH_{4}^{+}} + \underset{Strongacid}{Cl^{-}}$ (Acidic),

(3) $NaNO_{3}$ $\underset{Strongbase}{Na^{+}} + \underset{Strongacid}{NO_{3}^{-}}$ (Neutral),

(4) $CH_{3}COONH_{4}$ $\underset{Weakacid}{CH_{3}COO^{-}} + \underset{Weakbase}{NH_{4}^{+}}$

(Almost neutral),

May be slightly acidic or basic depending upon $pK_{a}$

and $pK_{b}$ values of acid and base.