Question

The product R in the following reaction is 

• A. A
• B. B
• C. C
• D. D

Hint:

Ozonolysis splits a C=C into two carbonyl compounds — identify substituents to know whether aldehydes or ketones form.

Answer 1

The Correct Option is D

Step 1: Understand ozonolysis.
Ozonolysis cleaves the C=C double bond and converts each alkene carbon into a carbonyl group.
If the carbon carried a hydrogen, the product is an aldehyde;
if it carried a carbon group, the product becomes a ketone.
Step 2: Apply to the given structure.
In the ring, the double bond connects two carbon atoms:
– One carbon bearing a methyl substituent → produces a ketone (Me–CO–).
– One carbon in the ring → also gives a ring-ketone.
Thus cleavage produces two carbonyls:
– A ring fragment containing a ketone.
– Another fragment giving a methyl ketone.
Step 3: Match with the options.
Option (C) corresponds exactly to these two carbonyl products generated upon ozonolysis followed by reductive work-up (aq. NaOH).
Step 4: Conclusion.
Therefore, the product is structure (C).