Medium MCQ +4 / -1 PYQ · JEE Mains 2022

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

  1. A Phosphonic acid
  2. B Phosphinic acid Correct answer
  3. C Pyrophosphorus acid
  4. D Hypophosphoric acid

Solution

P<sub>4</sub> + 3NaOH + 3H<sub>2</sub>O $\to$ PH<sub>3</sub> + 3NaH<sub>2</sub>PO<sub>2</sub><br/><br/> oxoacid = H<sub>3</sub>PO<sub>2</sub> (hypo phosphorus acid) or (phosphinic acid)

About this question

Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family

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