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Friday, 9 October

JEE Main Chemistry · Solutions

Calculating Ka from Freezing Point Depression

Calculating Ka from Freezing Point Depression (Solutions) was asked 3 times in 3 JEE Main shifts, 2022–2026, out of the 42 shifts Lumi analysed. 1 of the 3 had a numerical answer.

Times asked
3
in 3 shifts
Years
2022–2026
Usual format
Single correct
Calculation
Pattern
Frequent
repeats across shifts

How it is asked

  • Ka of weak acid from freezing point depression
  • Percent dissociation from freezing point depression

Difficulty

Easy 0Medium 3Hard 0

Where it sits

Chapter: Solutions. Topic: Colligative Properties, 36 questions over 16 ideas.

Other repeat ideas in this topic

Every time it came

All 3 questions

Newest first, each with its options and official answer.

  1. 2 Apr 2026, Shift 1 · Q5519.519.5 g of fluoro acetic acid (molar mass =78 g mol−1=78\ \mathrm{g\ mol^{-1}}) is dissolved in 500500 g of water at 298298 K. The depression in the…MediumSingle correct
  2. 8 Apr 2025, Shift 2 · Q53HA(aq)⇌H+(aq)+A−(aq)\mathrm{HA(aq) \rightleftharpoons H^+(aq) + A^-(aq)} The freezing point depression of a 0.1 m aqueous solution of a monobasic weak acid…MediumSingle correct
  3. 29 Jun 2022, Shift 1 · Q831.2 mL of acetic acid is dissolved in water to make 2.0 L of solution. The depression in freezing point observed for this strength of acid…MediumNumerical value