When exposed to light, colourless Nitric acid turnsdue to the formation of.

pale green

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yellow

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N O_{2}

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N O_{3}

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Solution

The correct options are
B yellow
C $N O_{2}$
In the presence of sunlight $H N O_{3}$ undergoes thermal decomposition and releases $N O_{2}$ gas. This gas is yellow-brown in colour. It is this colour which it adds to the nitric acid, which is otherwise colourless.

$4 H N O_{3} s u n l i g h t - ---- \to 4 N O_{2} + 2 H_{2} O + O_{2}$
$(y e l l o w)$

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