Question

$P_4+KOH+H_{2}O\to A+B{}_{\left(gas\right)}$

'A' is a basic salt of potassium. Find correct option(s) related to 'A' and 'B':

• A. In A, 2 hydrogen atoms are connected to phosphorous atom while in B, 3 atoms are connected to phosphorous atom
• B. B in its pure form has an unpleasant odour of garlic or rotten fish
• C. Acid corresponding to A is used to reduce benzene diazonium chloride to aniline
• D. B has a lesser dipole moment than ammonia

Answer 1

Answer: (A), (D)

The correct options are
A In A, 2 hydrogen atoms are connected to phosphorous atom while in B, 3 atoms are connected to phosphorous atom
D B has a lesser dipole moment than ammonia

$3KOH+P_4+3H_{2}O\to \underset{\left(A\right)}{3K{H}_{2}P{O}_2}+\underset{\left(B\right)}{P{H}_3}$


(b) Pure phosphine is odourless, but technical grade samples have a highly unpleasant odour like garlic or rotten fish, due to the presence of substituted phosphine and diphosphane $\left(P_2{H}_4\right)$.

(c) Acid corresponding to A is $H_{3}P{O}_2$ which is used to reduce benzene diazonium chloride to benzene.

(d) Ammonia is more polar than phosphine.