Assertion :Anhydrous $A l C l_{3}$ is covalent while aqueous $A l C l_{3}$ is ionic. Reason: In water $A l C l_{3}$ is present as $A l^{3 +}$ and $C l^{-}$ ion.

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
Anhydrous $A l C l_{3}$ is covalent due to low difference in electronegativity and also it exists in solid form while aqueous $A l C l_{3}$ is ionic as it forms ions in solutions.

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

Hence, the correct option is $B$

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