Aldehydes And Ketones Question 2
Question 2 - 25 January - Shift 1
Given below are two statements : one is labelled as Assertion $A$ and the other is labelled as Reason $R$ :
Assertion $A$ : Acetal/Ketal is stable in basic medium.
Reason $R$ : 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.
