Assertion : $0.1 M H_{3} P O_{3} (a q)$ solution has normality equal to $0.3 N$ when completely reacted with $N a O H$ . Reason: $H_{3} P O_{3}$ is a dibasic 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 D Assertion is incorrect but Reason is correct
$H_{3} P O_{3}$ is dibasic acid and so, it will give $2 H^{+}$ ion in solution.
$0.1 M H_{3} P O_{3} (a q)$ solution has normality equal to $0.2 N$ when completely reacted with $N a O H$ .

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