Which of the following compounds does not evolve a colored gas on decomposition?

M g (N O_{3})_{2}

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L i N O_{3}

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N a N O_{3}

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C a (N O_{3})_{2}

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Solution

The correct option is C $N a N O_{3}$
$N a N O_{3} Δ - \to N a N O_{2} + O_{2}$ .
In other reactions $N O_{2}$ is produced which is reddish-brown coloured gas.

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