The hybridizations of atomic orbitals of nitrogen in $NO_2^+, NO_3^-$ and $NH_4^+$ respectively are
$sp. sp^3$ and $sp^2$
$sp^2, sp^3$ and $sp$
$sp, sp^2$ and $sp^3$
$sp^2, sp$ and $sp^3$
The bond order of a molecule is given by
The correct order of the $O-O$ bond length in $O_2$ , $H_2O_2$ and $O_3$ is
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Assertion : $B_2$ molecule is diamagnetic.
Reason : The highest occupied molecular orbital is of $\sigma $ type.
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