JEE Main 2021 · ChemistryMultiple choiceSingle correctHardCalculation

JEE Main 25 February 2021, Shift 1, Chemistry Q33

Question 33 of 90 in this shift, Chemistry question 3 of 30, Section A.

The solubility of AgCN in a buffer solution of

\mathrm{pH}=3

x

. The value of

x

is : [Assume : No cyano complex is formed ;

\mathrm{K_{sp}(AgCN)}=2.2\times10^{-16}

and

\mathrm{K_a(HCN)}=6.2\times10^{-10}

]

(1) $0.625\times10^{-6}$
(2) $1.6\times10^{-6}$
(3) $2.2\times10^{-16}$
(4) $1.9\times10^{-5}$ Official answer

Official answer

Option 4

NTA final key.

Chapter: Equilibrium
Topic: Solubility Product
Idea tested: pH Effect on Solubility

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.