Given below are two statements : one is labeled as assertion (A) and the other is labeled as Reason (R).
Assertion (A): An aqueous solution of KOH when used for volumetric analysis, its concentration should be checked the use.
Reason (R): On aging, KOH solution absorbs atmospheric CO₂
In the light of the above statements, choose the correct answer from the options given below:

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(A) is not correct but(R) is correct

(A) is correct but (R) is not correct

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

answer is B.

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Detailed Solution

Concentration of KOH changes due to absorption of CO₂ from air. So it’s concentration must be checked before titration.

KOH is a good absorber of atmosphere CO₂

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