JEE Main 2022 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 29 July 2022, Shift 1, Chemistry Q86

Question 86 of 90 in this shift, Chemistry question 26 of 30, Section B.

If the solubility product of PbS is

8\times10^{-28}

, then the solubility of PbS in pure water at 298 K is

x\times10^{-16}

\mathrm{mol\ L^{-1}}

. The value of

x

is __________. (Nearest Integer) [Given :

\sqrt{2}

= 1.41]

Official answer

282

NTA final key.

Chapter: Equilibrium
Topic: Solubility Product
Idea tested: Solubility-Ksp Relationship

Same idea in other shifts

Asked 8× in all

5 Apr 2026, Shift 1 · Q55 $\mathrm{M_3A_2}$ is a sparingly soluble salt of molar mass $y$ g mol $^{-1}$ and solubility $x$ g L $^{-1}$ . The ratio of the molar…MediumSingle correct
1 Feb 2024, Shift 2 · Q64Solubility of calcium phosphate (molecular mass, M) in water is $\mathrm{W_g}$ per 100 mL at 25 $^\circ$ C. Its solubility product at 25…MediumSingle correct
27 Jul 2022, Shift 1 · Q86At 310 K, the solubility of $\mathrm{CaF_2}$ in water is $2.34 \times 10^{-3}$ g/100 mL. The solubility product of $\mathrm{CaF_2}$ is…EasyNumerical value
25 Jun 2022, Shift 2 · Q64The $\mathrm{K_{sp}}$ for bismuth sulphide ( $\mathrm{Bi_2S_3}$ ) is $1.08 \times 10^{-73}$ . The solubility of $\mathrm{Bi_2S_3}$ in…MediumSingle correct
31 Aug 2021, Shift 1 · Q54 $\mathrm{A_3B_2}$ is a sparingly soluble salt of molar mass M ( $\mathrm{g\,mol^{-1}}$ ) and solubility $x$ g $\mathrm{L^{-1}}$ . The…MediumNumerical value
25 Feb 2021, Shift 2 · Q32The solubility of $\mathrm{Ca(OH)_2}$ in water is : [Given : The solubility product of $\mathrm{Ca(OH)_2}$ in water $=5.5\times10^{-6}$ ]MediumSingle correct
9 Jan 2020, Shift 2 · Q27The solubility product of $\mathrm{Cr(OH)_3}$ at 298 K is $6.0\times10^{-31}$ . The concentration of hydroxide ions in a saturated solution…MediumSingle correct

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.