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The P-Block Elements

Question
CBSEENCH12011159
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Which of the following statements is not valid for oxoacids of phosphorus? 

  • Orthophosphoric acid is used in the manufacture of triple superphosphate

  • Hypophosphorous acid is a diprotic acid

  • All oxoacids contain tetrahedral four coordinated phosphorus

  • All oxoacids contain at least one P=O unit and one P-OH group

Solution

B.

Hypophosphorous acid is a diprotic acid

Hypophosphorous acid, H3PO2 has the following structure.

As it contains only one replaceable H-atom (that is attached to O, not with P directly so it is a monoprotic acid. 
All other given statements are true. 

Some More Questions From The p-Block Elements Chapter

Write a balanced equation for the hydrolytic reactions PCl5 in heavy water.

What is the basicity of H3PO4?

What happens when H3PO3 is heated?

List the important source of sulphur.

Write the order of thermal stability of the hydrides of Group 16 elements.

Why is H2O a liquid and H2S a gas?

Which of the following does not react with oxygen directly?
Zn, Ti, Pt, Fe

Complete the following reactions
(i) C2H4 + O2 →
(ii) 4Al + 3O2 →

Why does O3 act as a powerful oxidising agent?

How is O3 estimated quantitatively?

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