Can you explain the answer of this question below:Which of the following gas is evolved on heating ammonium dichromate?A:oxygenB:nitrogenC:ammoniaD:nitrous oxideThe answer is b.

Question

Answer

Answer: Nitrogen gas is evolved

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(N H 4) 2 C r 2 O 7 ⟶ Δ C r 2 O 3 + 4 H 2 O + N 2 ↑' role='presentation' style='display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative; user-select: text !important;'> (N H 4) 2 C r 2 O 7 ⟶ Δ C r 2 O 3 + 4 H 2 O + N 2 ↑

(Orange solid)�� (Green Ash) � �� (Nitrogen gas evolved)

Ammonium

dichromate

Answer

Heating ammonium dichromate results in the decomposition of the compound into its constituent elements. The products of this reaction are nitrogen gas, water vapor, and chromium (III) oxide.

Explanation:
- When ammonium dichromate is heated, it undergoes an exothermic decomposition reaction.
- The heat causes the ammonium ion (NH4+) and the dichromate ion (Cr2O7 2-) to break apart, forming nitrogen gas (N2), water vapor (H2O), and chromium (III) oxide (Cr2O3).
- The reaction can be represented by the following chemical equation: (NH4)2Cr2O7 → Cr2O3 + N2 + 4H2O
- Therefore, the gas evolved on heating ammonium dichromate is nitrogen gas (N2).

Note: Ammonia (NH3) is not a product of the decomposition of ammonium dichromate. While ammonium ions contain nitrogen, they do not combine with hydrogens to form ammonia in this reaction.

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