Question

Assertion :Both $H_{3}P{O}_3$ and $H_{3}P{O}_4$ have the same number of hydrogen atoms but $H_{3}P{O}_4$ is a tribasic acid and $H_{3}P{O}_3$ is a dibasic acid Reason: 1 mole of $H_{3}P{O}_3$ is neutralised by 2 moles of $NaOH$ while 1 mole of $H_{3}P{O}_4$ is neutralised by 3 moles of $NaOH$.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

$H_{3}P{O}_4$ is a tribasic acid so neutralised by 3 moles of $NaOH$ and $H_{3}P{O}_3$ is a dibasic acid so neutralised by 2 moles of $NaOH$.