${N O}_{2}$ is not obtained on heating:

A g {N O}_{3}

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K {N O}_{3}

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C u {({N O}_{3})}_{2}

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P b {({N O}_{3})}_{2}

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Solution

The correct option is B $K {N O}_{3}$
$2 A g {N O}_{3} Δ - \to 2 A g + 2 {N O}_{2} + O_{2}$

$2 K {N O}_{3} Δ - \to 2 K {N O}_{2} + O_{2}$

$2 C u {({N O}_{3})}_{2} Δ - \to 2 C u O + 4 {N O}_{2} + O_{2}$

$2 P b {({N O}_{3})}_{2} Δ - \to 2 P b O + 4 {N O}_{2} + O_{2}$

From the above reactions, it is concluded $N O_{2}$ is not obtained on heating $K N O_{3}$

So, the correct option is $B$

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