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To neutralize completely `20 mL` of `0.1M` aqueous solution of phosphorus `(H_(3)PO_(3))` acid the volume of `0.1M` aqueous `KOH` solution required is

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To neutralize completely `20 mL` of `0.1M` aqueous solution of phosphorus `(H_(3)PO_(3))` acid the volume of `0.1M` aqueous `KOH` solution required is:
A. 40 ml
B. 20ml
C. 10ml
D. 60ml
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Correct Answer - A
`V_(1)N_(1) = V_(2)N_(2)`
N of `H_(3)PO_(3) = 2 xx 0.1 = 0.2N`
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