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To neutralise completely 20 mL ofO. I M ...

To neutralise completely 20 mL ofO. I M aqueous solution of phosphorous acid `(H_(3)PO_(3)),` the value of 0.1 M aqueous KOH solution required is

A

40 mL

B

20 mL

C

10 mL

D

60 mL

Text Solution

Verified by Experts

The correct Answer is:
A
`N _(1) V_(1) =N_(2) V_(2) (H_(3) PO_(3)` is dibasic ` therefore M =2N `)
`20xx0.2 =0.1 xxV`
`therefore V = 40 ml`
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