Question

Consider the following statements with respect to citral: \[\begin{array}{rl} \bullet & \text{(A) Geranial and Neral are geometrical isomers of citral.} \\ \bullet & \text{(B) It forms geranic acid on heating with potassium hydrogen sulfate.} \\ \bullet & \text{(C) It gives 6-methylhept-5-en-2-one on treating with potassium carbonate.} \\ \bullet & \text{(D) On oxidation with silver oxide it yields Laevolic acid.} \\ \end{array}\] Choose the correct answer from the options given below:

• A. (A), (B) and (D) only
• B. (C) and (D) only
• C. (A) and (C) only
• D. (C) only

Hint:

Geranial and Neral are geometric isomers. Citral can form geranic acid and Laevolic acid under specific reactions.

Answer 1

The Correct Option is A

Step 1: Geranial and Neral.
Geranial and Neral are indeed geometrical isomers of citral, as they differ only in the orientation of the double bond at the aldehyde group. Hence, statement (A) is correct.

Step 2: Formation of Geranic acid.
Citral, on heating with potassium hydrogen sulfate, undergoes dehydration to form geranic acid, so statement (B) is also correct.

Step 3: Formation of 6-methylhept-5-en-2-one.
Citral does not form 6-methylhept-5-en-2-one when treated with potassium carbonate, making statement (C) incorrect.

Step 4: Oxidation to Laevolic acid.
On oxidation with silver oxide, citral undergoes cleavage to form Laevolic acid, making statement (D) correct.

Final Answer: \[ \boxed{\text{(A), (B) and (D) only}} \]