Question

JEE Mains Chemistry question is in the image

Answer 1

Answer:-

Option (1) is your answers!!!

• Refer the attachment

Answer 2

Answer :

Compound name : Pyrophosphoric acid

Molecular formula : $\bf{H_4P_2O_7}$

፨ Pyrophosphoric acid is also called diphosphoric acid.

፨ It is a triprotic acid.

Structure : See the attachment$.$

❍ No. of P = O bond ➝ 2

❍ No. of P - OH bond ➝ 4

❍ No. of P - O - P bond ➝ 1

Hence, Option-1 is correct.

How to remeber molecular formula!

Diphosphoric acid is a combination of two atoms of ortho phosphoric acid (H₃PO₄)

[2 × H₃PO₄] - H₂O ➝ $\bf{H_4P_2O_7}$