Assertion :Both Copper oxide and Manganese dioxide gives reaction with $H C l$ . Reason: Only Manganese dioxide gives a gaseous product.

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
Both Copper oxide and Manganese dioxide gives reaction with $H C l$
$M n O_{2} + 4 H C l \to M n C l_{2} + O_{2} ↑ + 2 H_{2} O$
$C u O + 2 H C l \to C u C l_{2} + H_{2} O$
Only Manganese dioxide gives a gaseous product.

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Assertion :Both Copper oxide and Manganese dioxide gives reaction with HCl. Reason: Only Manganese dioxide gives a gaseous product.

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Assertion :Both Copper oxide and Manganese dioxide gives reaction with $H C l$ . Reason: Only Manganese dioxide gives a gaseous product.