Chemical… | NUST Entrance Test Chemistry

Paramagnetic behaviour of $O_{2}$ is due to:

Difficulty: Easy

A:

Two molecular orbitals are partially filled

B:

Overlapping on only two partially filled orbitals

C:

Greater strength of pie bond than sigma bond

D:

All molecular orbitals are completely filled

According to valence bond theory, $O_{2}$ and $N_{2}$ molecules:

Difficulty: Easy

A:

$O_{2}$ is diamagnetic and $N_{2}$ is paramagnetic

B:

Both are paramagnetic

C:

Both are diamagnetic

D:

$O_{2}$ is paramagnetic and $N_{2}$ is diamagnetic

According to VSEPR theory:

Difficulty: Easy

A:

Shape of molecules is not explained well

B:

Lone pairs do not attract or repel to each other

C:

Molecular orbitals have low energy than atomic orbitals

D:

Electrons pairs stay at maximum distance with minimum repulsion

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