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Assertion (A): Lithium reacts with oxygen to form `Li_(2)O`, but potassium reacts with oxygen to form `KO_(2)`. Reason (R ): Potassium is more reactive than lithium.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 - B Correct reason: `Li^(o+)` ion having smaller size forms a stable oxide with small `O^(2-)` ion, whereas large `K^(o+)` ion forms a stable oxide with large `O_(2)^(2-)` ion. |
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