JEE Main 2022 · 29 Jun · Shift 1 · Chemistry Q71

ChemistrySingle correct+4 / -1Question 71 of 90

The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P-H bonds, is :

Phosphonic acid

Phosphinic acid

Pyrophosphorus acid

Hypophosphoric acid

Answer and worked solution

Official answer: B

$\mathrm{P_4+3NaOH+3H_2O\rightarrow PH_3+3NaH_2PO_2}$ . Hypophosphorous (phosphinic) acid $\mathrm{H_3PO_2}$ has two P-H bonds.

(B)

Topics:Oxoacids

JEE Main 2022 · 29 Jun · Shift 1, Chemistry question 71