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For 10-2 M   H3PO3 solution which of the following relations is correct ?

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a
H3PO3  +  H2PO3- +  HPO32- + PO32- = 10-2
b
H3PO3  +  H2PO3- +  HPO32-  = 10-2
c
H2PO3- +  HPO32- +  PO33-  = 10-2
d
H3PO3  +  H2PO3- +  2HPO32- = 10-2

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detailed solution

Correct option is B

H3PO3⇄H2PO3- + H+H2PO3-⇄HPO32- + H+ H3PO3  is a dibasic acid.

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