One litre of a solution contains 18.9 g of HNO3 and one litre of another solution contains 3.2 g of NaOH. In what volume ratio these solution be mixed to obtain a neutral solution ?

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3 : 8

8 : 3

15 : 4

4 : 15

answer is D.

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Detailed Solution

eqHNO3 = eqNaOHN1V1 = N2V218.963 × 1 × V1 = 3.240 × 1 × V2 ⇒ V1V2 = 201.6756 = 4 : 15

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