Arrange the following hydrides in the decreasing order of their basicities: NH 3, AsH 3, SbH 3, BiH 3 and PH 3

Question

Arrange the following hydrides in the decreasing order of their basicities: NH 3, AsH 3, SbH 3, BiH 3 and PH 3 (A) NH 3> AsH 3> SbH 3> BiH 3> PH 3 (B) NH 3> PH 3> AsH 3> SbH 3 ≥ BiH 3 (C) BiH 3> SbH 3> AsH 3> PH 3 ≥ NH 3 (D) PH 3> BiH 3> SbH 3> AsH 3> NH 3

Tardigrade Admin · Accepted Answer

The decreasing order of the basicities is NH 3> PH 3> AsH 3> SbH 3 ≥ BiH 3 This is because tendency to give lone pair decreases as the size of element of group- 15 increases.

Q. Arrange the following hydrides in the decreasing order of their basicities:
$N H_{3}, A s H_{3}, S b H_{3}, B i H_{3}$ and $P H_{3}$

$N H_{3} > A s H_{3} > S b H_{3} > B i H_{3} > P H_{3}$

$N H_{3} > P H_{3} > A s H_{3} > S b H_{3} \geq B i H_{3}$

$B i H_{3} > S b H_{3} > A s H_{3} > P H_{3} \geq N H_{3}$

$P H_{3} > B i H_{3} > S b H_{3} > A s H_{3} > N H_{3}$

The decreasing order of the basicities is
$N H_{3} > P H_{3} > A s H_{3} > S b H_{3} \geq B i H_{3}$
This is because tendency to give lone pair decreases as the size of element of group- $15$ increases.

Q. Arrange the following hydrides in the decreasing order of their basicities: NH3​,AsH3​,SbH3​,BiH3​ and PH3​

NH3​>AsH3​>SbH3​>BiH3​>PH3​

NH3​>PH3​>AsH3​>SbH3​≥BiH3​

BiH3​>SbH3​>AsH3​>PH3​≥NH3​

PH3​>BiH3​>SbH3​>AsH3​>NH3​