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(D) Statement $A$ is correct: Nitrogen compounds in intermediate oxidation states like $+1, +2, +3, +4$ are generally unstable and undergo disproporti

Vedclass · Accepted Answer

$A$ and $E$ Only

Vedclass · Answer

(D) Statement $A$ is correct: Nitrogen compounds in intermediate oxidation states like $+1, +2, +3, +4$ are generally unstable and undergo disproportionation in acidic media.Statement $B$ is incorrect: Nitrogen forms $ppi-ppi$ multiple bonds,not $dpi-ppi$ multiple bonds,because it lacks $d$-orbitals.Statement $C$ is incorrect: The $N-N$ single bond is weaker than the $P-P$ single bond due to high inter-electronic repulsion between the lone pairs of nitrogen atoms.Statement $D$ is incorrect: Density increases down the group as atomic mass increases significantly compared to volume.Statement $E$ is correct: Nitrogen lacks $d$-orbitals in its valence shell,so it can only use one $s$ and three $p$ orbitals for bonding,limiting its maximum covalency to $4$ (e.g.,in $NH_{4}^{+}$).Therefore,statements $A$ and $E$ are correct.

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