Assertion (A): Pure nitric acid on standing for long turns yellow. Reason (R): `HNO_(3)` undergoes decomposition and forms `NO_(2)`.A. Both A and R are true and R is correct explanation for A.B. Both A and R are true but R is not the correct for A.C. A is true and R is false.D. A is false and R is true.

Assertion (A): Pure nitric acid on standing for long turns yellow. Rea

1.	Assertion (A): Pure nitric acid on standing for long turns yellow. Reason (R): `HNO_(3)` undergoes decomposition and forms `NO_(2)`.A. Both A and R are true and R is correct explanation for A.B. Both A and R are true but R is not the correct for A.C. A is true and R is false.D. A is false and R is true.
Answer» Correct Answer - A Pure nitric acid on standing for long turns yellow due to its decomposition and the formation of NO_(2), NO_(2)` imparts yellow colour.