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A 100ml solution of 0.1 N HCl was titrat...

A 100ml solution of 0.1 N HCl was titrated with 0.2N NaOH solution. The titration was discontinued after adding 30ml of NaOH solution. The remaining titration was completed by adding 0.25N KOH solution. The volume of KOH required for completing the titration is

A

70ml

B

32ml

C

35ml

D

16ml

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The correct Answer is:
D
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50 cm^(3) of 0.2 N HCl is titrated against 0.1 N NaOH solution. The titration is discontinued after adding 50 cm^(3) of NaOH solution. The remaining titration is completed by adding 0.5 N KOH solution. What is the volume of KOH required for completing the titration ?