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JEE Main 202227 JulyMorning Shift
Exam
JEE Main
Year
2022
Date
27 July
Shift
Morning Shift
Subject
Chemistry
Chapter
p Block Elements (Group 15, 16, 17 & 18)

JEE Main 2022 · 27 July · Morning Shift · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Which oxoacid of phosphorous has the highest number of oxygen atoms...

Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?

Options

  1. APyrophosphorous acid
  2. BHypophosphoric acid
  3. CPhosphoric acid
  4. DPyrophosphoric acid

Correct answer

D. Pyrophosphoric acid

Step-by-step solution

In oxoacids phosphorus is tetrahedrally surrounded by other atoms.
All these acids contain at least one P=OP = O bond and one P–OHP – OH bond.

Pyrophosphorous acid →H4P2O5\to {H}_{4}{P}_{2}{O}_{5}.

Hypophosphoric acid →H4P2O6\to {H}_{4}{P}_{2}{O}_{6}.

Phosphoric acid →H3PO4\to {H}_{3}{PO}_{4}.

Pyrophosphoric acid →H4P2O7\to {H}_{4}{P}_{2}{O}_{7}.

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