Aldehydes And Ketones Question 2
Question 2 - 25 January - Shift 1
Given below are two statements : one is labelled as Assertion $\mathbf{A}$ and the other is labelled as Reason R :
Assertion A : Acetal/Ketal is stable in basic medium.
Reason $\mathbf{R}$ : The high leaving tendency of alkoxide ion gives the stability to acetal/ketal in basic medium.
In the light of the above statements, choose the correct answer from the options given below:
(1) A is true but $R$ is false
(2) A is false but $R$ is true
(3) Both A and R are true and R is the correct explanation of $A$
(4) Both A and R are true but R is NOT the correct explanation of $A$
Show Answer
Answer: (1)
Solution:
Formula: Acetaldehyde
For Assertion :Acetal and ketals are basically ethers hence they must be stable in basic medium but should break down in acidic medium.
Hence assertion is correct.
For reason: Alkoxide ion $(RO^{-})$is not considered a good leaving group hence reason must be false.
