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Question

Which one of the following is dibasic acid?


A

H3PO4

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B

H3BO3

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C

H3PO3

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D

H3AsO4

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Solution

The correct option is C

H3PO3


Explanation for the correct option:

(c ) H3PO3

Image result for h3po3
  • It has 2OH groups.
  • H3PO3 is a diabasic acid
  • Hence this option is correct

Explanation for the incorrect options:

(a) H3PO4

Image result for h3po4
  • it has 3OH groups.
  • H3PO4 is a tribasic acid
  • Hence this option is not correct

(b)H3BO3

Boric Acid ER Qualigens at Rs 888.00/unit | H3BO3, 10043-35-3, Orthoboric  acid, Boracic acid, Trihydrooxidoboron - Mascat Chemengers & Consultants,  Bhopal | ID: 23041699491
  • it has 3OH groups.
  • H3BO3 is a tribasic acid
  • Hence this option is not correct

(d) H3AsO4

Arsenic Acid Formula: Structure, Preparations and Properties
  • it has 3OH groups.
  • H3AsO4 is a tribasic acid
  • Hence this option is not correct

Hence the correct option is (c ) H3PO3


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