JEE Main 2020 · ChemistryMultiple choiceSingle correctMediumCalculation

JEE Main 9 January 2020, Shift 1, Chemistry Q30

Question 30 of 75 in this shift, Chemistry question 5 of 25, Section A.

The

\mathrm{K_{sp}}

for the following dissociation is

1.6\times10^{-5}

\mathrm{PbCl_{2(s)} \rightleftharpoons Pb^{2+}_{(aq)} + 2Cl^{-}_{(aq)}}

Which of the following choices is correct for a mixture of 300 mL 0.134 M

\mathrm{Pb(NO_3)_2}

and 100 mL 0.4 M NaCl ?

(1) $Q > \mathrm{K_{sp}}$ Official answer
(2) $Q = \mathrm{K_{sp}}$
(3)Not enough data provided
(4) $Q < \mathrm{K_{sp}}$

Official answer

Option 1

NTA final key (Jan 2020).

Chapter: Equilibrium
Topic: Solubility Product
Idea tested: Precipitation Condition

Same idea in other shifts

Asked 5× in all

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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.