On heating ammonium dichromate, the gas evolved is:

Oxygen

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Ammonia

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Nitrous oxide

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Nitrogen

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Solution

The correct option is D Nitrogen
Ammonium dichromate on heating produces nitrogen gas, water vapor and chromium (III) oxide.
$(N H_{4})_{2} C r_{2} O_{7} Δ - \to C r_{2} O_{3} (s) + N_{2} (g) + 4 H_{2} O (g)$

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(N H_{4})_{2} C r_{2} O_{7} \to C r_{2} O_{3} + 4 H_{2} O + N_{2}

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