The following are some statements related to VA group hydrides
I) Reducing property increases from `NH_(3)` to `BiH_(3)`
II) Tendency to donate lone pair decreases from `NH_(3)` to `BiH_(3)`
III) Ease of replacing H with `Cl` decreases from `NH_(3)` to `BiH_(3)`
IV) Ease of formation of hydrides decreases from `NH_(3)` to `BiH_(3)`
The correct statement are

Options

A. I,II,III and IV
B. I,III and IV
C. I,II and IV
D. I and IV

Answer

A

Explanation

(I) The reducing property of the hydrides of V A group increases from `NH_(3)` to `BiH_(3)` as M-H bond length increases. ltrgt (Where `M=N,P` As Sb, Bi) ltrgt `NH_(3) lt PH_(3) lt AsH_(3) lt SbH_(3) lt BiH_(3)`
(II) The tendency to donate lone pair or basic strength decreases from `NH_(3)` to `BiH_(3)`. ,brgt `NH_(3) gt PH_(3) gt AsH_(3) gt SbH_(3) gt BiH_(3)`.
(III) Thermal stability of