JEE Main 2022 — Chemistry Inorganic Chemistry

2022mcqeasy

The correct order of bond orders of ${C}_{2}^{2-},{N}_{2}^{2-}$ and ${O}_{2}^{2-}$ is

Official previous-year question

Held on 24 Jun 2022 · Verified 6 Jul 2026.

Options

A
${C}_{2}^{2-}>{N}_{2}^{2-}>{O}_{2}^{2-}$
B
${O}_{2}^{2-}>{N}_{2}^{2-}>{O}_{2}^{2-}$
C
${N}_{2}^{2-}>{O}_{2}^{2-}>{C}_{2}^{2-}$
D
${C}_{2}^{2-}>{O}_{2}^{2-}>{N}_{2}^{2-}$

Did you get this right?

Solution

Bond order $=\frac{{N}_{b}-{N}_{a}}{2}$

${N}_{B}=$ Number of electrons in bonding molecular orbitals.

${N}_{A\cdot B}=$ Number of electrons in anti bonding molecular orbitals.

${C}_{2}^{2-}$ has $14$ electrons, it is isoelectronic with ${N}_{2}$ where Bond order $=3$ ,

${N}_{2}^{2-}$ has $16$ electrons is isoelectronic with ${O}_{2}$ whose bond order $=2$

${O}_{2}^{2-}$ has $18$ electrons and is isoelectronic with ${F}_{2}$ whose bond order $=1$

So, the correct order of Bond order is

${C}_{2}^{2-}>{N}_{2}^{2-}>{O}_{2}^{2-}$ .

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JEE Main Inorganic Chemistry in other years

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JEE Main 2022 — Chemistry Inorganic Chemistry

2022mcqeasy

The correct order of bond orders of ${C}_{2}^{2-},{N}_{2}^{2-}$ and ${O}_{2}^{2-}$ is

Official previous-year question

Held on 24 Jun 2022 · Verified 6 Jul 2026.

Options

A
${C}_{2}^{2-}>{N}_{2}^{2-}>{O}_{2}^{2-}$
B
${O}_{2}^{2-}>{N}_{2}^{2-}>{O}_{2}^{2-}$
C
${N}_{2}^{2-}>{O}_{2}^{2-}>{C}_{2}^{2-}$
D
${C}_{2}^{2-}>{O}_{2}^{2-}>{N}_{2}^{2-}$

Did you get this right?

Solution

Bond order $=\frac{{N}_{b}-{N}_{a}}{2}$

${N}_{B}=$ Number of electrons in bonding molecular orbitals.

${N}_{A\cdot B}=$ Number of electrons in anti bonding molecular orbitals.

${C}_{2}^{2-}$ has $14$ electrons, it is isoelectronic with ${N}_{2}$ where Bond order $=3$ ,

${N}_{2}^{2-}$ has $16$ electrons is isoelectronic with ${O}_{2}$ whose bond order $=2$

${O}_{2}^{2-}$ has $18$ electrons and is isoelectronic with ${F}_{2}$ whose bond order $=1$

So, the correct order of Bond order is

${C}_{2}^{2-}>{N}_{2}^{2-}>{O}_{2}^{2-}$ .

Your note

JEE Main Inorganic Chemistry in other years

Keep practicing Inorganic Chemistry

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

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JEE Main 2022 — 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

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JEE Main 2022 — 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