NEET PYQs for Molecular Orbital Theory with Solutions: Practice NEET Previous Year Questions

Updated on - Jan 19, 2026

Molecular Orbital Theory is an important topic in the Chemistry section in NEET exam. Practising this topic will increase your score overall and make your conceptual grip on NEET exam stronger.

This article gives you a full set of NEET PYQs for Molecular Orbital Theory with explanations for effective preparation. Practice of NEET Chemistry PYQs including Molecular Orbital Theory questions regularly will improve accuracy, speed, and confidence in the NEET 2026 exam.

NEET PYQs for Molecular Orbital Theory with Solutions

1.
The correct order of the $O - O$ bond length in $O_2,H_2 O_2 $ and $O_3 $ is
- $O_2 > O_3 > H_2O_2$
- $O_3 > H_2O_2 > O_2 $
- $O_2 > H_2O_2 >O_3$
- $H_2O_2 > O_3 > O_2 $
View Solution
2.
Which of the following diatomic molecular species has only bonds according to Molecular Orbital Theory?
- $O_2$
- $N_2$
- $C_2$
- $B_2$
View Solution
3.
Which of the following is not hydrolysed?
- $ AsCl_{3}$
- $ PF_{3}$
- $ SbCl_{3}$
- $ NF_{3}$
View Solution
4.
Which one is a wrong statement ?
- Total orbital angular momentum of electron in ‘s’ orbital is equal to zero.
- The electronic configuration of N atom is
- An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.
- The value of m for d_z2 is zero.
View Solution
5.
Which of the following pairs of ions are isoelectronic and isostructural ?
- ${ SO_3^{2-} , NO^-_3 }$
- ${ ClO_3^- , SO_3^{2-} }$
- ${CO_3^{2-} , SO_3^{2-} }$
- ${ ClO^-_3 , CO_3^{2-}}$
View Solution
6.
Which of the following options represents the correct bond order ?
- ${ O-_2 > O_2 < O_2^+}$
- ${ O-_2 < O_2 > O_2^+}$
- ${ O-_2 > O_2 > O_2^+}$
- ${ O-_2 < O_2 < O_2^+}$
View Solution
7.
The correct order of $ N - O $ bond lengths in $NO, NO_2^-, NO_3^- $ and $ N_2O_4 $ is
- $N_2O_4 > NO_2^- > NO_3^- > NO$
- $ NO > NO_3^- > N_2O_4 > NO_2^-$
- $ NO_3^- > NO_2^- > N_2O_4 > NO$
- $ NO > N_2O_4 > NO_2^- > NO_3^- $
View Solution
8.
The ion which is isoelectronic with CO is
- $CN^-$
- $O^-_2$
- $N^+_2$
- $O^+_2$
View Solution
9.
The correct order of $C-O $ bond length among $CO,CO_3^{2-}$, $CO_2$ is
- $CO_2 < CO_3^{2-} < CO$
- $CO < CO_3^{2-} < CO_2$
- $CO_3^{2-} < CO_2 < CO$
- $CO < CO_2 < CO_3^{2-}$
View Solution
10.
Orbital is :
- circular path around the nucleus in which the electrons revolves
- space around the nucleus where the probablity of finding the electron is maximum
- amplitude of electron wave
- none of the above
View Solution