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Labeen Kulkarni
Asked: 2022-11-01T16:56:24+05:30 In:

0.4 g of polybasic acid HnA (all the hydrogens are acidic) requries 0.5 g of NaOH for complete neutralisation. The number of replaceable hydrogen atoms and the molecular weight of A would be (Mw of `acid=96)`
A. `2,94`
B. `1,95`
C. `3,93`
D. `4,92`

0.4 g of polybasic acid HnA (all the hydrogens are acidic) requries 0.5 g of NaOH for complete neutralisation. The number of replaceable hydrogen atoms and the molecular weight of A would be (Mw of `acid=96)`
A. `2,94`
B. `1,95`
C. `3,93`
D. `4,92`
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  1. Correct Answer – D
    `mEq Acid=mEq base`
    `implies(0.4)/((Mw)/(n))xx1000=(0.5)/((40)/(1))xx1000`
    `impliesn=3 and H_(n)A-=96impliesA=96-3xx1=93`

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