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Friday, 9 October

NEET UG 2019 · Chemistry · Question 70

NEET 2019 Chemistry, question 70

Question 70 of the NEET 2019 paper (code P1) is a Chemistry question from Solutions. Its idea, Ideal Solutions, was asked twice, in 2019 and 2026, across NEET 2017–2026. The NTA final answer key gives option 3.

Updated 2026-10-08

Q70 · Chemistry

For an ideal solution, the correct option is :

  1. 1ΔmixS=0\Delta_{mix}S = 0 at constant T and P
  2. 2ΔmixV≠0\Delta_{mix}V \neq 0 at constant T and P
  3. 3ΔmixH=0\Delta_{mix}H = 0 at constant T and POfficial answer
  4. 4ΔmixG=0\Delta_{mix}G = 0 at constant T and P

Official answer: option 3 · NTA final answer key

Same idea

Ideal Solutions, in other papers

NEET asked this idea twice, in 2019 and 2026. The other question below.

  • 2026 Q54Assertion A: For an ideal solution formed by mixing liquids P and Q, ΔmixH=0\Delta_{mix}H=0 and ΔmixV=0\Delta_{mix}V=0 Reason R: No interactions…Assertion–reason · Medium

Ideal Solutions: every question and how it was framed

The chapter

Solutions in ten years of NEET

16 questions from 2017–2026, asked in 8 of 10 papers, about 1.6 a paper. Solutions and Colligative Properties alone had 16.

Chapter analysisStudy this chapterPractise this chapter

Solutions: questions per paper

0242’170’182’192’202’211’220’232’243’252’26