Vanillin, used as a flavouring agent, is:
1. An Aliphatic alcohol
2. An Aromatic aldehyde
3. A Hydrocarbon
4. A Carbohydrate

The product formed by the reaction of an aldehyde with a primary amine is:
1. Ketone
2. Carboxylic acid
3. Aromatic acid
4. Schiff base

A compound that can be reduced to the corresponding hydrocarbon by Zn-Hg/ conc. HCl is:

1. Butan-2-one                         

2. Acetic acid

3. Acetamide                             

4. Ethyl acetate

The correct sequence of increasing orders of reactivity in nucleophilic addition reaction is:

1. Butanone < Propanone < Propanal < Ethanal

2. Butanone > Propanone > Propanal > Ethanal

3. Butanone < Propanal < Propanone < Ethanal

4.  Propanal < Propanone < Ethanal < Butanone