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.
In the light of the above statements, choose the correct answer from the options given below:
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.
In the light of the above statements, choose the correct answer from the options given below:
- (A)Both Statement I and Statement II are false✓ Correct
- (B)Statement I is false but Statement II is true
- (C)Both Statement I and Statement II are true
- (D)Statement I is true but Statement II is false
Answer: (A)
Solution
Statement I claims cross aldol condensation between two different aldehydes always gives four products. This holds only when both aldehydes carry -hydrogens; if one lacks -hydrogens only two products form, so the word always makes the statement incorrect. Statement II claims semicarbazide condenses with acetophenone only from a benzaldehyde-acetophenone mixture; in fact semicarbazide forms semicarbazones with both carbonyl compounds, and the more reactive benzaldehyde is not excluded, so this statement is also incorrect. Both statements are false.
JEE Main · 2026 · 24 Jan 2026 · Shift 2 · Single correct option