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A filter paper soaked in salt X turns br...

A filter paper soaked in salt X turns brown when exposed to `HNO_(3)` vapour. The salt X is

A

KCl

B

KBr

C

Kl

D

`K_(2)SO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
C
`2KI+4HNO_(3)toI_(2)+2NO_(2)+2KNO_(3)+2H_(2)O`
Iodide ion is a strong reducing agent and reduces `HNO_(3)" vapours to " NO_(2)` (Brown gas)
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