Which one of these compounds will NOT give an oxygen gas on heating?
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Correct Answer: Option E
Explanation:
The correct answer is: E. Ammonium nitrate
Let's break it down:
Most of the listed compounds decompose on heating to release oxygen gas (Oâ‚‚):
- A. Manganese dioxide (MnOâ‚‚): This acts as a catalyst in the decomposition of hydrogen peroxide but does not release oxygen on its own during heating.
- B. Hydrogen peroxide (Hâ‚‚Oâ‚‚): Decomposes to give water and oxygen gas:
\[ 2Hâ‚‚Oâ‚‚ \rightarrow 2Hâ‚‚O + Oâ‚‚ \]
- C. Zinc nitrate (Zn(NO₃)₂): Decomposes to give zinc oxide, nitrogen dioxide, and oxygen gas:
\[ 2Zn(NO₃)₂ \rightarrow 2ZnO + 4NO₂ + O₂ \]
- D. Sodium nitrate (NaNO₃): Decomposes to give sodium nitrite and oxygen gas:
\[ 2NaNO₃ \rightarrow 2NaNO₂ + O₂ \]
- E. Ammonium nitrate (NH₄NO₃): Decomposes without releasing oxygen gas. It gives nitrous oxide (N₂O) and water:
\[ NH₄NO₃ \rightarrow N₂O + 2H₂O \]
Therefore, ammonium nitrate does NOT release oxygen gas, making option E the correct answer.
The correct answer is: E. Ammonium nitrate
Let's break it down:
Most of the listed compounds decompose on heating to release oxygen gas (Oâ‚‚):
- A. Manganese dioxide (MnOâ‚‚): This acts as a catalyst in the decomposition of hydrogen peroxide but does not release oxygen on its own during heating.
- B. Hydrogen peroxide (Hâ‚‚Oâ‚‚): Decomposes to give water and oxygen gas:
\[ 2Hâ‚‚Oâ‚‚ \rightarrow 2Hâ‚‚O + Oâ‚‚ \]
- C. Zinc nitrate (Zn(NO₃)₂): Decomposes to give zinc oxide, nitrogen dioxide, and oxygen gas:
\[ 2Zn(NO₃)₂ \rightarrow 2ZnO + 4NO₂ + O₂ \]
- D. Sodium nitrate (NaNO₃): Decomposes to give sodium nitrite and oxygen gas:
\[ 2NaNO₃ \rightarrow 2NaNO₂ + O₂ \]
- E. Ammonium nitrate (NH₄NO₃): Decomposes without releasing oxygen gas. It gives nitrous oxide (N₂O) and water:
\[ NH₄NO₃ \rightarrow N₂O + 2H₂O \]
Therefore, ammonium nitrate does NOT release oxygen gas, making option E the correct answer.