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What will be the normality of a solution containing 4.9 g. `H_(3)PO_(4)` dissolved in 500 ml water

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What will be the normality of a solution containing 4.9 g. `H_(3)PO_(4)` dissolved in 500 ml water
A. `0.3`
B. `1.0`
C. `3.0`
D. `0.1`
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Correct Answer - A
`N=(w xx 1000)/(E xx "volume in ml."),E = (98)/(3) = 32.6`
`N=(4.9xx1000)/(32.6xx500)=0.3 N`.
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