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  • Which of the following is not an acidic salt?Option: 1 <img alt="\mathrm{NaH}_{2} \mathrm{PO}_{2}" src="https://entrancecorner.oncodecogs.com/gif.lat

Which of the following is not an acidic salt?

Option: 1

\mathrm{NaH}_{2} \mathrm{PO}_{2}


Option: 2

\mathrm{NaH}_{2} \mathrm{PO}_{3}


Option: 3

\mathrm{NaH}_{2} \mathrm{PO}_{4}


Option: 4

\mathrm{Na}_{2} \mathrm{HPO}_{4}


Answers (1)

best_answer

\mathrm{H}_{3} \mathrm{PO}_{2} is a monobasic acid which means it has only one replaceable proton.

On reaction with \mathrm{NaOH}, it forms \mathrm{NaH}_{2} \mathrm{PO}_{2}.

\mathrm{H}_{3} \mathrm{PO}_{2}+\mathrm{NaOH} \rightarrow \mathrm{NaH}_{2} \mathrm{PO}_{2}

No other hydrogen atom of \mathrm{NaH}_{2} \mathrm{PO}_{2} is replaceable.

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