Assertion : $H_{3} P O_{3}$ is a dibasic acid. Reason: Two $H - a t o m s$ are directly attached to phosphorus $^{'} P^{'}$ .

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 C Assertion is correct but Reason is incorrect
$H_{3} P O_{3}$ has three $H$ atoms out of which only tow are attached through oxygen, and are ionisable. Third hydrogen is not ionisable because it is directly attached to phosphorous. Hence $H_{3} P O_{3}$ is a dibasic acid.

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Assertion :H3PO3 is a dibasic acid. Reason: Two H−atoms are directly attached to phosphorus ′P′.

The correct option is C Assertion is correct but Reason is incorrectH3PO3 has three H atoms out of which only tow are attached through oxygen, and are ionisable. Third hydrogen is not ionisable because it is directly attached to phosphorous. Hence H3PO3 is a dibasic acid.

Assertion : $H_{3} P O_{3}$ is a dibasic acid. Reason: Two $H - a t o m s$ are directly attached to phosphorus $^{'} P^{'}$ .

The correct option is C Assertion is correct but Reason is incorrect
$H_{3} P O_{3}$ has three $H$ atoms out of which only tow are attached through oxygen, and are ionisable. Third hydrogen is not ionisable because it is directly attached to phosphorous. Hence $H_{3} P O_{3}$ is a dibasic acid.