$N O_{2}$ liberates _________ from potassium iodide solution.

violet iodide vapors

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reddish iodide vapors

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violet potassium vapors

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both

A

and

C

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Solution

The correct option is A violet iodide vapors
Nitrogen dioxide is the chemical compound with the formula $N O_{2}$ . It is one of several nitrogen oxides. It is a reddish-brown irritating gas which on treating with potassium iodide liberates violet iodide vapors.

$2 K l + 2 N O_{2} \to 2 K N O_{2} + I_{2}$ (violet vapors)

So, the correct option is $A$

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