JEE Main 2023 — Chemistry Inorganic Chemistry

2023mcqmedium

The complex with highest magnitude of crystal field splitting energy $({\Delta }_{0})$ is

Official previous-year question

Held on 15 Apr 2023 · Verified 6 Jul 2026.

Options

A
${[\mathrm{Ti}({\mathrm{OH}}_{2})6]}^{3+}$
B
${[\mathrm{Cr}{({\mathrm{OH}}_{2})}_{6}]}^{3+}$
C
${[\mathrm{Mn}{({\mathrm{OH}}_{2})}_{6}]}^{3+}$
D
${[\mathrm{Fe}{({\mathrm{OH}}_{2})}_{6}]}^{3+}$

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Solution

Crystal field stabilisation energy of the complex can be calculated as follows,

CFSE = $\mathrm{number}\mathrm{of}{t}_{2g}\mathrm{electrons}\times (-0.4)+\mathrm{number}\mathrm{of}{e}_{g}\mathrm{electrons}\times (0.6)$

Complex CFSE

${[\mathrm{Ti}{({\mathrm{OH}}_{2})}_{6}]}^{3+}({{t}_{2g}}^{1}{{e}_{g}}^{0})$ $–0.4{\Delta }_{0}$

${[\mathrm{Cr}{({H}_{2}O)}_{6}]}^{3+}({{t}_{2g}}^{3}{{e}_{g}}^{0})$ $–1.2{\Delta }_{0}$

${[\mathrm{Mn}{({H}_{2}O)}_{6}]}^{3+}({{t}_{2g}}^{3}{{e}_{g}}^{1})$ $–0.6{\Delta }_{0}$

${[\mathrm{Fe}{({H}_{2}O)}_{6}]}^{3+}({{t}_{2g}}^{3}{{e}_{g}}^{2})$ $0$

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JEE Main Inorganic Chemistry in other years

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JEE Main 2023 — Chemistry Inorganic Chemistry

2023mcqmedium

The complex with highest magnitude of crystal field splitting energy $({\Delta }_{0})$ is

Official previous-year question

Held on 15 Apr 2023 · Verified 6 Jul 2026.

Options

A
${[\mathrm{Ti}({\mathrm{OH}}_{2})6]}^{3+}$
B
${[\mathrm{Cr}{({\mathrm{OH}}_{2})}_{6}]}^{3+}$
C
${[\mathrm{Mn}{({\mathrm{OH}}_{2})}_{6}]}^{3+}$
D
${[\mathrm{Fe}{({\mathrm{OH}}_{2})}_{6}]}^{3+}$

Did you get this right?

Solution

Crystal field stabilisation energy of the complex can be calculated as follows,

CFSE = $\mathrm{number}\mathrm{of}{t}_{2g}\mathrm{electrons}\times (-0.4)+\mathrm{number}\mathrm{of}{e}_{g}\mathrm{electrons}\times (0.6)$

Complex CFSE

${[\mathrm{Ti}{({\mathrm{OH}}_{2})}_{6}]}^{3+}({{t}_{2g}}^{1}{{e}_{g}}^{0})$ $–0.4{\Delta }_{0}$

${[\mathrm{Cr}{({H}_{2}O)}_{6}]}^{3+}({{t}_{2g}}^{3}{{e}_{g}}^{0})$ $–1.2{\Delta }_{0}$

${[\mathrm{Mn}{({H}_{2}O)}_{6}]}^{3+}({{t}_{2g}}^{3}{{e}_{g}}^{1})$ $–0.6{\Delta }_{0}$

${[\mathrm{Fe}{({H}_{2}O)}_{6}]}^{3+}({{t}_{2g}}^{3}{{e}_{g}}^{2})$ $0$

Your note

JEE Main Inorganic Chemistry in other years

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Work through every JEE Main Inorganic Chemistry PYQ, year by year.

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JEE Main 2023 — Chemistry Inorganic Chemistry

Options

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Solution

Your note

JEE Main Inorganic Chemistry in other years

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Physical Chemistry

Organic Chemistry

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JEE Main 2023 — Chemistry Inorganic Chemistry

Options

Did you get this right?

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

Keep practicing Inorganic Chemistry