Q13 / 120 · JEE Main 2007 · Chemistry

In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?

  • A
    $\mathrm{C}_2 \longrightarrow \mathrm{C}_2^{+}$
  • Correct answer
    B
    $\mathrm{NO} \longrightarrow \mathrm{NO}^{+}$
  • C
    $\mathrm{O}_2 \longrightarrow \mathrm{O}_2^{+}$
  • D
    $\mathrm{N}_2 \longrightarrow \mathrm{N}_2^{+}$

Solution

In $\mathrm{C}_2-\mathrm{C}_2{ }^{+}$electron is removed from bonding molecular orbital so bond order decreases. In $\mathrm{NO}$ $\longrightarrow \mathrm{NO}^{+}$, electron is removed from anti bonding molecular orbital so bond order increases and nature changes from paramagnetic to diamagnetic. Hence, (B) is correct.

Hence, the correct answer is option: 'B'.

Relevant Questions