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At 25^(@), Kb for CN^- (conjugate base o...

At `25^(@)`, `K_b` for `CN^-` (conjugate base of HCN) is `2.5xx10^(-5)`. If 25 mL of 0.01(M) aqueous NaOH solution is added to 50mL of 0.01(M) HCN solution, then-

A

pH of the resulting solution is 11.2

B

pH of the resulting solution is 9.4

C

at `25^(@)C` the ionisation constant for HCN is `4xx10^(-10)`

D

at `25^(@)C` the ionisation constant for HCN is `2.5xx10^(-5)`

Text Solution

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The correct Answer is:
B, C
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