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Give the balanced equation. On heating orange solid (P) giving $$\text{Cr}_2\text{O}_3$$ a colourless gas (Q) and water. (Q is most abundant gas in atmosphere).
Correct Answer: 0
PLACEHOLDER ANSWER - the answer is an equation. Q is nitrogen, and the orange solid P is ammonium dichromate. $$(\text{NH}_4)_2\text{Cr}_2\text{O}_7 \xrightarrow{\Delta} \text{Cr}_2\text{O}_3 + \text{N}_2 + 4\text{H}_2\text{O}$$.
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