There is only one –NH₂ group involved in semicarbazone formation out of two –NH₂ group. It is due to:

1. Resonance  of one type of –NH₂ group

2. Inductive effect of one type of –NH₂ group

3. Hyperconjugation of one type of –NH₂ group

4. Reverse hyperconjugation of one type of -NH₂ group

What type of reaction is demonstrated by the process involving a carboxylic acid, an alcohol, and an acid that results in the formation of esters?
1. Reversible slow process
2. Irreversible fast process
3. Cyclic process
4. Adiabatic process

The below reaction is an example of

\(CH_{3}CH_{2}OH \ + \ CH_{3}COCl \xrightarrow[]{\textbf{Pyridine}} \)
\( CH_{3}COOC_{2}H_{5} \ + \ HCl\)

1. Acetylation

2. Benzoylation

3. Cross aldol condensation

4. Cross Cannizzaro reaction

The correct sequence of reagents used for the preparation of

Methyl benzoate  from benzene  is -

1. a = Br₂ / FeBr₃ ; b = Mg/ Dry ether ;  c = CO_{2 ;} H₃O⁺ ; d = Excess methanol conc. H⁺ Heat 

2. a = Mg/ Dry ether ; b = Br₂ / FeBr₃ ;  c = CO_{2 ;} H₃O⁺ ; d = Excess methanol conc. H⁺ Heat

3. a = CO_{2 ;} H₃O⁺ ; b = Br₂ / FeBr₃ ;  c = Mg/ Dry ether  ; d = Excess methanol conc. H⁺Heat 

4. a = Excess methanol conc. H⁺ Heat  ; b = Br₂ / FeBr₃ ;  c = Mg/ Dry ether ; d = CO_{2 ;} H₃O⁺

The correct sequence of reagents used for the preparation of Phenylacetic acid from benzene are :

The correct sequence of reagents used to yield p-Nitrobenzaldehyde from benzene is:

Chemical test(s) to distinguish between the Propanal and Propanone is :

Chemical test(s) used to distinguish between Acetophenone and Benzophenone is :

1. Tollen’s test

2. Fehling’s test

3. Iodoform test

4. All of the above

A chemical test to distinguish between Phenol and Benzoic acid is :

1. Tollen’s test

2. Fehling’s test

3. Iodoform test

4. Ferric chloride test