Question:
Identify \(A\) and \(B\) from the following reaction
\[
NaNO_3 \xrightarrow{\Delta} xA + yB
\]
Identify \(A\) and \(B\) from the following reaction
\[ NaNO_3 \xrightarrow{\Delta} xA + yB \]
\[ NaNO_3 \xrightarrow{\Delta} xA + yB \]
Show Hint
Thermal decomposition of alkali metal nitrates:
\[
MNO_3 \xrightarrow{\Delta} MNO_2 + O_2
\]
except lithium nitrate, which forms oxide instead of nitrite.
Updated On: Jun 15, 2026
- \(NaNO_2,\; O_2\)
- \(Na_2O,\; NO_2\)
- \(Na_2O,\; NO\)
- \(Na,\; NO_2\)
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The Correct Option is A
Solution and Explanation
Step 1: Recall the thermal decomposition of alkali metal nitrates.
Alkali metal nitrates except lithium nitrate decompose on heating to form nitrites and oxygen gas.
For sodium nitrate, the decomposition reaction is
\[ 2NaNO_3 \xrightarrow{\Delta} 2NaNO_2 + O_2 \]
Step 2: Identify products \(A\) and \(B\).
Comparing with the given reaction,
\[ A=NaNO_2 \] and
\[ B=O_2 \]
Step 3: Verify the reaction type.
This is a thermal decomposition reaction in which sodium nitrate loses oxygen on heating to form sodium nitrite.
Step 4: Final conclusion.
Hence, the correct products are
\[ \boxed{NaNO_2,\; O_2} \]
Alkali metal nitrates except lithium nitrate decompose on heating to form nitrites and oxygen gas.
For sodium nitrate, the decomposition reaction is
\[ 2NaNO_3 \xrightarrow{\Delta} 2NaNO_2 + O_2 \]
Step 2: Identify products \(A\) and \(B\).
Comparing with the given reaction,
\[ A=NaNO_2 \] and
\[ B=O_2 \]
Step 3: Verify the reaction type.
This is a thermal decomposition reaction in which sodium nitrate loses oxygen on heating to form sodium nitrite.
Step 4: Final conclusion.
Hence, the correct products are
\[ \boxed{NaNO_2,\; O_2} \]
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