Chemistry · 2026
JEE Main · 24 January 2026, Shift 1 · Q60
Given below are two statements: Statement I: Hybridisation, shape and spin only magnetic moment of K_3[ Co ( CO_3)_3] is sp^3 d^2, octahedral and 4.9…
Given below are two statements:
Statement I: Hybridisation, shape and spin only magnetic moment of $\displaystyle \mathrm{K}_3\left[\mathrm{Co}\left(\mathrm{CO}_3\right)_3\right]$ is $\displaystyle \mathrm{sp}^3 \mathrm{~d}^2$, octahedral and $\displaystyle 4.9$ BM respectively.Statement II: Geometry, hybridisation and spin only magnetic moment values (BM) of the ions $\displaystyle \left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-},\left[\mathrm{MnBr}_4\right]^{2-}$ and $\displaystyle \left[\mathrm{CoF}_6\right]^{3-}$ respectively are square planar, tetrahedral, octahedral; $\displaystyle \mathrm{dsp}^2, \mathrm{sp}^3, \mathrm{sp}^3 \mathrm{~d}^2$ and $\displaystyle 0$, $\displaystyle 5.9$, 4.9.In the light of the above statements, choose the correct answer from the options given below
Official answer
From NTA’s final answer key for this paper.
(3)
Both Statement I and Statement II are true
(4)
Statement I is false but Statement II is true
NTA’s answer key accepts either.
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JEE Main 2026 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.