Assertion :Na $_{2}$ O is basic oxide whereas Cl $_{2}$ O $_{7}$ is acidic oxide. Reason: Elements on extreme left form basic oxides whereas elements on extreme right form acidic oxides.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Na $_{2}$ O reacts with water to form a strong base NaOH.
Cl $_{2}$ O $_{7}$ reacts with water to form strong acid.
Na $_{2}$ O $+ H_{2} O \to 2$ NaOH
Cl $_{2}$ O $_{7}$ $+ H_{2} O \to 2 H C l O_{4}$
in aqueous solution, sodium hydroxide (NaOH) dissociates to provide hydroxide ions. In aqueous solution, perchloric acid ( $H C l O_{4}$ ) dissociates to provide hydrogen ions.

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