Question

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : An aqueous solution of $KOH$ when used for volumetric analysis, its concentration should be checked before the use.
Reason (R) : On aging, $KOH$ solution absorbs atmospheric $CO _2$.
In the light of the above statements, choose the correct answer from the options given below :

• A. (A) is correct but (R) is not correct
• B. (A) is not correct but (R) is correct
• C. Both $( A )$ and $( R )$ are correct but $(R)$ is not the correct explanation of $( A )$
• D. Both $( A )$ and $( R )$ are correct and $( R )$ is the correct explanation of $( A )$

Answer 1

Answer: (D)

$KOH$ absorb $CO _2$
So its concentration should be checked.