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Friday, 9 October

NEET UG 2018 · Chemistry · Question 72

NEET 2018 Chemistry, question 72

Question 72 of the NEET 2018 paper (code AA) is a Chemistry question from Coordination Compounds. Its idea, Geometric Isomerism in CN6, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 3.

Updated 2026-10-08

Q72 · Chemistry

The type of isomerism shown by the complex [CoCl2(en)2]\mathrm{[CoCl_2(en)_2]} is

  1. 1Ionization isomerism
  2. 2Coordination isomerism
  3. 3Geometrical isomerismOfficial answer
  4. 4Linkage isomerism

Official answer: option 3 · CBSE official answer key

Same idea

The only question on Geometric Isomerism in CN6

No other NEET paper from 2017–2026 tested this exact idea.

Geometric Isomerism in CN6: every question and how it was framed

The chapter

Coordination Compounds in ten years of NEET

27 questions from 2017–2026, asked in 10 of 10 papers, about 2.6 a paper. Coordination Isomerism alone had 4.

Coordination Compounds: questions per paper

0364’173’181’191’202’212’222’233’243’256’26