Home Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) General Which of the following statements is true fo…
Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) General Single Correct MCQ
Published on: August 12, 2026

Which of the following statements is true for HNO 2 ?

A
It can be prepared by acidifying an aqueous solution of nitrite.
B
It is unstable weak acid which is known only in aqueous solution.
C
N 2 O 3 is an anhydride of HNO 2 .
D
All of these

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Text Solution

Verified by Experts
The correct answer is:
D

Ba(NO 3 ) 2 + H 2 SO 4 ⎯→ 2HNO 2 + BaSO 4 ↓

It is an unstable, weak acid which is known only in aqueous solution.

2HNO 2 ⎯→ N 2 O 3 + H 2 O

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