Assertion :Equivalent mass of $H_{3} P O_{2}$ is equal to its molecular mass. Reason: $H_{3} P O_{2}$ is a monobasic acid.

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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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Equivalent mass of $H_{3} P O_{2}$ is equal to its molecular mass since it is mono basic acids.Number of replacable hydrogen in $H_{3} P O_{2}$ is 1.
So the equivalent mass of $H_{3} P O_{2}$ is equals to molecular mass.
So both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Hence option A is correct.

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Assertion :Equivalent mass of H3PO2 is equal to its molecular mass. Reason: H3PO2 is a monobasic acid.

Assertion :Equivalent mass of $H_{3} P O_{2}$ is equal to its molecular mass. Reason: $H_{3} P O_{2}$ is a monobasic acid.