Assertion : $H_{3} P O_{2}$ can act as strong reducing agent and gives disproportionation reaction on heating. Reason: Due to presence of one $- O H$ group and $P - H$ group, $H_{3} P O_{2}$ is a monobasic bronsted 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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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
1.option A is correct. Both the statements are correct.
2.Two $P - H$ bonds are present in the hypophosphorus acid. Hence, it behaves as a reducing agent.
3.Structure of $H_{3} P O_{2}$ contains only one $P - O H$ bond: since no. of $P - O H$ bonds determine the bascisity of $o x o$ acids of phosphorus, $H_{3} P O_{2}$ which has single $P - O H$ bond is mono basic

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Assertion :H3PO2 can act as strong reducing agent and gives disproportionation reaction on heating. Reason: Due to presence of one −OH group and P−H group, H3PO2 is a monobasic bronsted acid.

Assertion : $H_{3} P O_{2}$ can act as strong reducing agent and gives disproportionation reaction on heating. Reason: Due to presence of one $- O H$ group and $P - H$ group, $H_{3} P O_{2}$ is a monobasic bronsted acid.