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Friday, 9 October

JEE Main 2025 · ChemistryMultiple choiceSingle correctMediumCalculation

JEE Main 2 April 2025, Shift 1, Chemistry Q56

Question 56 of 75 in this shift, Chemistry question 6 of 25, Section A.

If equal volumes of AB2\mathrm{AB_2} and XY (both are salts) aqueous solutions are mixed, which of the following combination will give a precipitate of AY2\mathrm{AY_2} at 300 K ? (Given KspK_{sp} (at 300 K) for AY2=5.2×10−7\mathrm{AY_2}=5.2\times10^{-7})
  1. (1)2.0×10−22.0\times10^{-2} M AB2\mathrm{AB_2}, 2.0×10−22.0\times10^{-2} M XYOfficial answer
  2. (2)1.5×10−41.5\times10^{-4} M AB2\mathrm{AB_2}, 1.5×10−31.5\times10^{-3} M XY
  3. (3)2.0×10−42.0\times10^{-4} M AB2\mathrm{AB_2}, 0.8×10−30.8\times10^{-3} M XY
  4. (4)3.6×10−33.6\times10^{-3} M AB2\mathrm{AB_2}, 5.0×10−45.0\times10^{-4} M XY

Official answer

Option 1

NTA final key.

Chapter
Equilibrium
Topic
Solubility Product
Idea tested
Precipitation Condition

Same idea in other shifts

Asked 2× in all
  1. 11 Apr 2023, Shift 1 · Q6325 mL of silver nitrate solution (1M) is added dropwise to 25 mL of potassium iodide (1.05 M) solution. The ion(s) present in very small…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 42 of the 174 JEE Main shifts held from 2017 to 2026.