What is the molecular formula of pyrophosphoric acid?

1. $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}$
2. $\mathrm{H}_{3} \mathrm{PO}_{4}$
3. $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}$
4. $\mathrm{H}_{2} \mathrm{P}_{2} \mathrm{O}_{5}$

Solution

Pyrophosphoric acid

Asked in: MHT CET 2020 (20 Oct Shift 1)

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