Q.

The normality of 0.3 M phosphorus acid H3PO3 is

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a

0.1

b

0.9

c

0.3

d

0.6

answer is D.

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Detailed Solution

H3PO3 is a dibasic acid and thus its molecular weight = 2 x equivalent wt.Molarity = Normality x basicity∴     1  M  =  2NHence,  0.3 M=2  ×  0.3  =  0.6  N
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