Copper nitrate is heated to form copper oxide, gas X and gas Y. Gas X is colourless and neutral to litmus. Gas Y is brown in colour having an irritating odour and non-combustible. Gas Y turns green acidified ferrous solution brown. Gas Y is:

H₂S

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NO₂

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N₂O

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O₂

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Solution

The correct option is B
NO₂

Copper nitrate is heated to form copper oxide, oxygen and nitrogen dioxide gas.

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

Oxygen gas is colourless and neutral to litmus. Nitrogen dioxide gas is brown in colour having an irritating odour and non-combustible. Nitrogen dioxide gas turns green acidified ferrous solution brown.

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Copper nitrate is heated to form copper oxide, gas X and gas Y. Gas X is colourless and neutral to litmus. Gas Y is brown in colour having an irritating odour and non-combustible. Gas Y turns green acidified ferrous solution brown. Gas Y is:

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