The product(s) formed when $\mathrm{H}_2 \mathrm{O}_2$ reacts with disodium hydrogen phosphate is

1. $\mathrm{P}_2 \mathrm{O}_5 \cdot \mathrm{Na}_3 \mathrm{PO}_4$
2. $\mathrm{Na}_2 \mathrm{HPO}_4 \cdot \mathrm{H}_2 \mathrm{O}_2$
3. $\mathrm{NaH}_2 \mathrm{PO}_4, \mathrm{H}_2 \mathrm{O}$
4. $\mathrm{Na}_2 \mathrm{HPO}_4 \cdot \mathrm{H}_2 \mathrm{O}$

Solution

$\mathrm{H}_2 \mathrm{O}_2$ forms addition product with disodium hydrogen phosphate.

Asked in: AP EAMCET 2012

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