JEE Main 2022 · 27 Jul · Shift 1 · Chemistry Q70 · Dronacharya Exams

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ChemistrySingle correct+4 / -1Question 70 of 90

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

A

Pyrophosphorus acid

B

Hypophosphoric acid

C

Phosphoric acid

D

Pyrophosphoric acid

Answer and worked solution

Official answer: D

Oxygen count.

Pyrophosphoric acid $\mathrm{H_4P_2O_7}$ : 7.
Hypophosphoric acid $\mathrm{H_4P_2O_6}$ : 6.
Pyrophosphorous acid $\mathrm{H_4P_2O_5}$ : 5.
Phosphoric acid $\mathrm{H_3PO_4}$ : 4.

(D)

Topics:Oxoacids

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