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Assertion (A): `Na_(2)CO_(3)` and `Li_(2)CO_(3)` are thermally stable. Reason (R ): Both the carbonates are salts of large cations and large anions.A. If both (A) and (R ) are correct and (R ) is the correct explanation of (A).B. If both (A) and (R ) are correct, but (R ) is not the correct explanation of (A).C. If (A) is correct, but (R ) is incorrect.D. If (A) is incorrect, but (R ) is correct. |
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Answer» Correct Answer - D Correct reason: `Na_(2)CO_(3)` is thermally stable, but `Li_(2)CO_(3)` decomposes on heating. `Li_(2)CO_(3)overset(Delta)rarr Li_(2)O+CO_(2)` Correct reason: `Na_(2)CO_(3)` is thermally stable as large cation, `Na^(o+)`, form a stable compound with larger anion `CO_(3)^(2-)`, whereas `Li_(2)CO_(3)` is unstable as it is a salt of small `Li^(o+)` ion and larger `CO_(3)^(2-)` ion. |
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