JEE Main · 2021 · Shift-IIeasyBOND-112

In the following, the correct bond order sequence is:

Chemical Bonding · Class 11 · JEE Main Previous Year Question

Question

In the following, the correct bond order sequence is:

Options
  1. a

    O22−>O2+>O2−>O2\mathrm{O_2^{2-} > O_2^+ > O_2^- > O_2}

  2. b

    O2+>O2−>O22−>O2\mathrm{O_2^+ > O_2^- > O_2^{2-} > O_2}

  3. c

    O2+>O2>O2−>O22−\mathrm{O_2^+ > O_2 > O_2^- > O_2^{2-}}

    ✓
  4. d

    O2>O2−>O22−>O2+\mathrm{O_2 > O_2^- > O_2^{2-} > O_2^+}

Correct Answerc

O2+>O2>O2−>O22−\mathrm{O_2^+ > O_2 > O_2^- > O_2^{2-}}

Detailed Solution

🧠 Bond order is proportional to bond strength. For the oxygen species, every additional electron enters an antibonding π∗\pi^* orbital.

| Species | e | BO | |---|---|---| | \ceO2+\ce{O2+} | 15 | 2.5 | | \ceO2\ce{O2} | 16 | 2 | | \ceO2−\ce{O2-} | 17 | 1.5 | | \ceO22−\ce{O2^{2-}} | 18 | 1 |

Decreasing bond order: \ceO2+>O2>O2−>O22−\ce{O2+ > O2 > O2^- > O2^{2-}}

Answer: (c) \ceO2+>O2>O2−>O22−\boxed{\text{Answer: (c) } \ce{O2^+ > O2 > O2^- > O2^{2-}}}

Practice this question with progress tracking

Want timed practice with adaptive difficulty? Solve this question (and hundreds more from Chemical Bonding) inside The Crucible, our adaptive practice platform.

Practice in The Crucible →Browse Chemical Bonding chapter →

More JEE Main Chemical Bonding PYQs

2023medium

According to MO theory the bond orders for O22-, CO and NO+ respectively, are

2023medium

In which of the following processes does the bond order increase and paramagnetic character change to diamagnetic?

2023medium

What is the number of unpaired electrons in the highest occupied molecular orbital of the following species: N2, N2+, O2, O2+?

2023medium

The bond order and magnetic property of acetylide ion (C22-) are same as that of

2023medium

The bond order and magnetic property of acetylide ion are same as that of

View all 111 Chemical Bonding PYQs →