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Friday, 9 October

NEET UG 2018 · Chemistry · Question 76

NEET 2018 Chemistry, question 76

Question 76 of the NEET 2018 paper (code AA) is a Chemistry question from States of Matter. Its idea, van der Waals Equation, was asked twice, both in 2018, across NEET 2017–2026. The CBSE official answer key gives option 3.

Updated 2026-10-08

Q76 · Chemistry

Given van der Waals constant for NH3\mathrm{NH_3}, H2\mathrm{H_2}, O2\mathrm{O_2} and CO2\mathrm{CO_2} are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied ?

  1. 1O2\mathrm{O_2}
  2. 2H2\mathrm{H_2}
  3. 3NH3\mathrm{NH_3}Official answer
  4. 4CO2\mathrm{CO_2}

Official answer: option 3 · CBSE official answer key

Same idea

van der Waals Equation, in other papers

NEET asked this idea twice, both in 2018. The other question below.

  • 2018 Q86The correction factor 'a' to the ideal gas equation corresponds toOne-line MCQ · Easy

van der Waals Equation: every question and how it was framed

The chapter

States of Matter in ten years of NEET

10 questions from 2017–2026, asked in 6 of 10 papers, about 0.9 a paper. Ideal Gas Law alone had 10.

Chapter analysis

States of Matter: questions per paper

0240’172’181’191’202’212’222’230’240’250’26