JEE Main 2021 — Chemistry Inorganic Chemistry

2021mcqmedium

Given below are two statements :

Statement I: ${[\mathrm{Mn}(\mathrm{CN}{)}_{6}]}^{3-},{[\mathrm{Fe}(\mathrm{CN}{)}_{6}]}^{3-}$ and ${[\mathrm{Co}{({C}_{2}{O}_{4})}_{3}]}^{3-}$ are ${d}^{2}{\mathrm{sp}}^{3}$ hybridised.

Statement II : ${[{\mathrm{MnCl}}_{6}]}^{3-}$ and ${[{\mathrm{FeF}}_{6}]}^{3-}$ are paramagnetic and have $4$ and $5$ unpaired electrons, respectively.

In the light of the above statements, choose the correct answer from the options given below:

Official previous-year question

Held on 27 Jul 2021 · Verified 6 Jul 2026.

Options

A
Statement I is correct but statement II is false
B
Both statement I and statement II are false
C
Statement I is incorrect but statement II is true
D
Both statement I and statement II are are true

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Solution

JEE Main 2021 Chemistry, Coordination Compounds — solution figure 1

${\mathrm{CN}}^{-}$ is strong field ligand. ${C}_{2}{O}_{4}^{2-}$ is chelating ligand. ${\mathrm{Mn}}^{3+}$ has ${d}^{4}$ configuration. ${\mathrm{Fe}}^{3+}$ has ${d}^{5}$ configuration. ${\mathrm{Co}}^{3+}$ has ${d}^{6}$ configuration.

$\Rightarrow$ All will have larger splitting values hence, they undergo ${d}^{2}{\mathrm{sp}}^{3}$ hybridisation.

${[{\mathrm{MnCl}}_{6}]}^{3-}$ ${[{\mathrm{FeF}}_{6}]}^{3-}$

${d}^{4}$ configuration, ${\mathrm{Cl}}^{-}$ ${d}^{5}$ configuration, ${F}^{-}$

JEE Main 2021 Chemistry, Coordination Compounds — solution figure 2

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Solution

JEE Main 2021 Chemistry, Coordination Compounds — solution figure 1

$\Rightarrow$ All will have larger splitting values hence, they undergo ${d}^{2}{\mathrm{sp}}^{3}$ hybridisation.

${[{\mathrm{MnCl}}_{6}]}^{3-}$ ${[{\mathrm{FeF}}_{6}]}^{3-}$

${d}^{4}$ configuration, ${\mathrm{Cl}}^{-}$ ${d}^{5}$ configuration, ${F}^{-}$

JEE Main 2021 Chemistry, Coordination Compounds — solution figure 2

JEE Main 2021 — Chemistry Inorganic Chemistry

Options

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Solution

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JEE Main Inorganic Chemistry in other years

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JEE Main 2021 — Chemistry Inorganic Chemistry

Options

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Solution

Your note

JEE Main Inorganic Chemistry in other years

More JEE Main Inorganic Chemistry questions

Other Chemistry topics for JEE Main

Physical Chemistry

Organic Chemistry

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