JEE Chemistry

Abnormal Molar Mass & van't Hoff Factor: JEE Questions & Solutions

8 previous-year JEE Chemistry questions on Abnormal Molar Mass & van't Hoff Factor, each with a worked step-by-step solution.

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Previous-year questions

  1. 01The observed and normal molar masses of compound MX₂ are 65.6 and 164 respectively. The percent degree of ionisation of MX₂ is % (Nearest…NVAMediumJEE 2025
  2. 02If A₂B is 30% ionised in an aqueous solution, then the value of van't Hoff factor i is:NVAEasyJEE 2025
  3. 03The percentage dissociation of a salt (MX₃) solution at a given temperature (van't Hoff factor i = 2) is % (Nearest integer)NVAEasyJEE 2025
  4. 04Match List I with List II | List I | List II | |---|---| | (A) van't Hoff factor, i | (I) Cryoscopic constant | | (B) k_f | (II) Isotonic…MCQEasyJEE 2023
  5. 05Consider the following pairs of solutions which will be isotonic at the same temperature. The number of isotonic pairs is: 1. 1 M NaCl and…NVAEasyJEE 2023
  6. 06Consider the following pairs of solution which will be isotonic at the same temperature. The number of pairs of solutions is/are A. 1 M aq.…NVAEasyJEE 2023
  7. 070.004 M K₂SO₄ solution is isotonic with 0.01 M glucose solution. Percentage dissociation of K₂SO₄ is (Nearest integer)MCQEasyJEE 2023
  8. 0880 mole percent of MgCl₂ is dissociated in aqueous solution. The vapour pressure of 1.0 molal aqueous solution of MgCl₂ at 38^° C is mm Hg.…NVAMediumJEE 2023

Frequently asked questions

Our bank has 8 previous-year JEE Chemistry questions tagged to Abnormal Molar Mass & van't Hoff Factor, drawn from JEE papers between 2023 and 2025, including 3 from 2025 alone. Each comes with a full step-by-step solution.

Abnormal Molar Mass & van't Hoff Factor is rated Advanced overall for JEE Chemistry. The PYQs on this page break down as 6 easy, 2 medium.

Of the 8 previous-year questions on Abnormal Molar Mass & van't Hoff Factor, 2 are multiple-choice (MCQ) and 6 are numerical-value (NVA) questions.

Based on recent paper analysis, Abnormal Molar Mass & van't Hoff Factor is worth about 1 mark in JEE Main. It sits in Solutions, a Class 12 Chemistry chapter.

More Solutions topics

Colligative Properties30Concentration Terms (Molarity, Molality, etc.)21Raoult's Law & Vapour Pressure19

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