Q 1 :    

m-chlorobenzaldehyde on treatment with 50% KOH solution yields                 [2024]

Q 2 :    

Given below are two statements:                                                                                             [2024]

Statement I: Acidity of $\mathrm{\alpha }$-hydrogens of aldehydes and ketones is responsible for Aldol reaction.

Statement II: Reaction between benzaldehyde and ethanal will NOT give Cross – Aldol product.

In the light of the above statements, choose the most appropriate answer from the options given below.

[Aldol Condensation Reaction]

• Statement I is incorrect but Statement II is correct.

   

• Statement I is correct but Statement II is incorrect.

   

• Both Statement I and Statement II are correct.

   

• Both Statement I and Statement II are incorrect.

   

Q 3 :    

Two moles of benzaldehyde and one mole of acetone under alkaline conditions using aqueous NaOH after heating gives $\mathrm{x}$ as the major product. The number of $\pi$ bonds in the product $\mathrm{x}$ is _______.                [2024]

Q 4 :    

The major product of the following reaction is :             [2025]

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}=\mathrm{O}\underset{\mathrm{reflux}}{\overset{\text{excess HСНО alkali}}{\to }}?$

• 

   

• 

   

• 

   

• ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{OH}$

   

Q 5 :    

A man has been asked to synthesise the molecule  (x). He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He thought of performing ozonolysis reaction on alkene to produce a dicarbonyl compound followed by aldol reaction to prepare “x”. Predict the suitable alkene that can lead to the formation of “x”.            [2025]

Q 6 :    

Aldol condensation is a popular and classical method to prepare $\mathrm{\alpha },\mathrm{\beta }$-unsaturated carbonyl compounds. This reaction can be both intermolecular and intramolecular. Predict which one of the following is not a product of intramolecular aldol condensation?            [2025]

Q 7 :    

When 

undergoes intramolecular aldol condensation, the major product formed is :           [2025]