NEETChemistryRedox Reactions
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 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.
Options
- A(A) is not correct but (R) is correct
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- CBoth (A) and (R) are correct and (R) is the correct explanation of (A)
- D(A) is correct but (R) is not correct
Correct answer
C. Both (A) and (R) are correct and (R) is the correct explanation of (A)
Step-by-step solution
KOH absorb CO 2 based on the following reaction: CO 2 ( g ) + 2 KOH ( aq ) → K 2 CO 3 ( aq ) + H 2 O ( l ) Thus, concentration of Carbon dioxide decreases over time, prior to volumetric analysis concentration of potassium hydroxide should be checked.