The nitrogen atoms in NH 3, NH 2-and NH 4+are all surrounded by eight electrons. When these species are arranged in increasing of H - N - H bond angle, correct order is

Question

The nitrogen atoms in NH 3, NH 2-and NH 4+are all surrounded by eight electrons. When these species are arranged in increasing of H - N - H bond angle, correct order is (A) NH 3, NH 2-, NH 4+ (B) NH 4+, NH 2-, NH 3 (C) NH 3, NH 4+, NH 2- (D) NH 2-, NH 3, NH 4+

Tardigrade Admin · Accepted Answer

Repulsion l p-l p l p-b p l p-b p>b p-b p>b p-b p b p-b p Due to repulsion, bond angle decreases Bond angle NH 2-< NH 3< NH 4+

Q. The nitrogen atoms in $N H_{3}, N H_{2}^{-}$ and $N H_{4}^{+}$ are all surrounded by eight electrons. When these species are arranged in increasing of $H - N - H$ bond angle, correct order is

$N H_{3}, N H_{2}^{-}, N H_{4}^{+}$

$N H_{4}^{+}, N H_{2}^{-}, N H_{3}$

$N H_{3}, N H_{4}^{+}, N H_{2}^{-}$

$N H_{2}^{-}, N H_{3}, N H_{4}^{+}$

Repulsion $lp - lplp - b p$
$lp - b p > b p - b p > b p - b p$
$b p - b p$
Due to repulsion, bond angle decreases
Bond angle $N H_{2}^{-} < N H_{3} < N H_{4}^{+}$

Q. The nitrogen atoms in NH3​,NH2−​and NH4+​are all surrounded by eight electrons. When these species are arranged in increasing of H−N−H bond angle, correct order is

NH3​,NH2−​,NH4+​

NH4+​,NH2−​,NH3​

NH3​,NH4+​,NH2−​

NH2−​,NH3​,NH4+​