MolSynapsequestion bank

MolSynapse / Question bank / Chemical Bonding / Molecular orbital theory

JEE Main levelSingle correct optionDifficulty 2 of 3cb132

According to MO theory, the $C X_{2}$ molecule contains

Aone $σ$ and one $π$ bond
Btwo $π$ bonds and no $σ$ bond
Cone $σ$ bond and two unpaired electrons
Dtwo $σ$ bonds

Answer: B

C X_{2}

has 8 valence electrons:

(σ 2 s)^{2} (σ^{*} 2 s)^{2} (π 2 p_{x})^{2} (π 2 p_{y})^{2}

. The

σ

pair and

σ^{*}

pair cancel, leaving two

π

bonds (bond order 2) and no net

σ

bond.

Practice Chemical Bonding More on Molecular orbital theory

Previous questionNext question

More questions on Molecular orbital theory