From the following metals whose nitrate produces $N O_{2}$ gas on heating?

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None of the above

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Solution

The correct option is C Pb
Reactions:
$2 K N O_{3} \to 2 K N O_{2} + O_{2}$
$2 N a N O_{3} \to 2 N a N O_{2} + O_{2}$
$2 P b (N O_{3})_{2} ⟶ 2 P b O + 4 N O_{2} + O_{2}$

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