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Friday, 9 October

JEE Main 2020 · ChemistryMultiple choiceSingle correctHardData or graph

JEE Main 8 January 2020, Shift 1, Chemistry Q26

Question 26 of 75 in this shift, Chemistry question 1 of 25, Section A.

The stoichiometry and solubility product of a salt with the solubility curve given below is, respectively :

The figure, in words

Solubility curve: [Y]/mM (vertical, ticks 1, 2, 3) vs [X]/mM (horizontal, ticks 1, 2, 3); a decreasing convex (hyperbola-like) curve that flattens near [Y] = 1 mM at larger [X].
  1. (1)XY, 2×10−62\times10^{-6} M3^3
  2. (2)XY2\mathrm{XY_2}, 4×10−94\times10^{-9} M3^3Official answer
  3. (3)X2Y\mathrm{X_2Y}, 2×10−92\times10^{-9} M3^3
  4. (4)XY2\mathrm{XY_2}, 1×10−91\times10^{-9} M3^3

Official answer

Option 2

NTA final key (Jan 2020).

Chapter
Equilibrium
Topic
Solubility Product
Idea tested
Ksp Expression Writing

Same idea in other shifts

Asked 2× in all
  1. 9 Apr 2024, Shift 2 · Q63For a sparingly soluble salt AB2\mathrm{AB_2}, the equilibrium concentrations of A2+\mathrm{A^{2+}} ions and B−\mathrm{B^-} ions are…EasySingle 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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.