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Question

The normality of 0.3 M phosphorous acid is

A
0.1 N
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B
0.9 N
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C
0.3 N
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D
0.6 N
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Solution

The correct option is D 0.6 N
H3PO4 is phosphorous acid whose basicity is 2
now we know that for an acid
N=aM
Where N is normality, a is basicity of the acid and M is molarity so
N=2×0.3=0.6N

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