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JEE Main 202229 JuneMorning Shift
Exam
JEE Main
Year
2022
Date
29 June
Shift
Morning Shift
Subject
Chemistry
Chapter
p Block Elements (Group 15, 16, 17 & 18)

JEE Main 2022 · 29 June · Morning Shift · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

The oxoacid of phosphorus that is easily obtained from a reaction...

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

Options

  1. APhosphonic acid
  2. BPhosphinic acid
  3. CHypophosphoric acid
  4. DPyrophosphorus acid

Correct answer

B. Phosphinic acid

Step-by-step solution

White phosphorus is a translucent white waxy solid. It is poisonous, insoluble in water but soluble in carbon disulphide and glows in dark (chemiluminescence). It dissolves in boiling NaOHNaOH solution in an inert atmosphere giving PH3{PH}_{3}.

P4+3NaOH+3H2O→PH3+3NaH2PO2(sodiumhypophosphite){P}_{4} + 3NaOH + 3{H}_{2}O \to {PH}_{3} + 3{NaH}_{2}{PO}_{2} ( sodiumhypophosphite )

Sodium hypophosphite is a salt of Phosphinic acid (Hypophosphorous acid).

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