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Question
On heating zinc nitrate, the products formed are zinc oxide, nitrogen dioxide and oxygen. Zinc oxide is:
P a black solid
Q brown when hot, yellow when cold
R yellow when hot, white when cold
Which of the following is true?
Options
Only P
Only Q
Only R
Both Q and R
MCQ
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Solution
Only R
Explanation:
Zinc oxide is yellow when hot and white when cold. Therefore, statement R is correct, while P and Q are incorrect.
\[\ce{2Zn(NO3)2 ->[heat] 2ZnO + 4NO2 + O2}\]
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