Question

Given below are two statements:
Statement I: Cross aldol condensation between two different aldehydes will always produce four different products.
Statement II: When semicarbazide reacts with a mixture of benzaldehyde and acetophenone under optimum pH, it forms a condensation product with acetophenone only.

• A. Statement I is false but Statement II is true
• B. Both Statement I and Statement II are false
• C. Statement I is true but Statement II is false
• D. Both Statement I and Statement II are true

Hint:

Aldehydes are generally more reactive than ketones in nucleophilic addition reactions.

Answer 1

The Correct Option is C

Step 1: Analysis of Statement I.
Cross aldol condensation between two aldehydes having $\alpha$-hydrogens can form four products due to self and cross reactions. Hence, Statement I is true.
Step 2: Analysis of Statement II.
Semicarbazide reacts with both aldehydes and ketones. Benzaldehyde reacts faster than acetophenone due to less steric hindrance. Hence, Statement II is false.
Step 3: Conclusion.
Statement I is true, but Statement II is false.