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Chemistry D and F - Block Elements General Comprehension

Published by: CGP EDU Academic Team

Published on: August 13, 2026

Given:

AgCl(s) + 2NH 3 Ag(NH 3 ) 2 + + Cl – Kº = 2.79 × 10 –3 AgCl(s)+2NH 4 OH Ag(NH 3 ) 2

+ + Cl – + 2H 2 O

Kº = 8.46 × 10 –7 (i) The solubility of AgCl(s) in 1(M) NH 3 is about

Correct Answers for Comprehension Sub-Questions

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The correct answer is:

CHECK THE SOLUTION.

(i)

Sol. AgCl(s) + 2NH 3 Ag(NH 3 ) 2 + + Cl –

s s

= 2.79 × 10 –3 = 27.9 × 10 –4 s = 5.28 × 10

–2 (M) ~ 0.053 (M)

(ii)

Sol. AgCl(s) + 2NH 4 OH

Ag(NH 3 ) 2 + + Cl – + 2H 2 O

s s

∴ = 8.46 × 10 –7 or s = × 10

–4 = 9.19 × 10 –4 (M) ~ 9.2 × 0 –4 (M)

(iii)

Sol. Let equilibrium constant for the reaction

NH 3 + H 2 O NH 4 OH is K

∴ K 2 = × 10 7 × 2.79 × 10 –3 = 10 4 × 0.33 or K = 57.43

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