MolSynapsequestion bank

MolSynapse / Question bank / Chemical Bonding / Molecular orbital theory

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3cb156

Which of the following statements about $C X_{2}$ is/are correct according to MO theory?

AIt is diamagnetic
BIts bond order is 2
CIts HOMO is a $π$ molecular orbital
DIt has two unpaired electrons

Answer: A, B, C

C X_{2}

:

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

. All electrons are paired (diamagnetic), bond order

= (6 - 2) /2 = 2

, and the highest occupied orbitals are the

π 2 p

pair. It has no unpaired electrons, so (D) is false.

Practice Chemical Bonding More on Molecular orbital theory

Previous questionNext question

More questions on Molecular orbital theory

Which of the following species gains stability (its bond order increases) when it accepts one additional electron? JEE Advanced level
The highest occupied molecular orbitals (HOMO) of N2 and O2 respectively are JEE Advanced level
Which of the following statements about the oxygen species O2, O2^+, O2^- and O2^2- is/are correct? JEE Advanced level
Which of the following species is/are paramagnetic with a bond order of 2.5? JEE Advanced level
Which of the following statements about molecular orbitals is/are correct? JEE Advanced level
In which of the following changes does the bond length decrease? JEE Advanced level