IUPAC name of acraldehyde is :

• but-3-en-1-al

• propenyl aldehyde

• prop-2-en-1-al

• propanal

Which of the following reacts fastest with a mixture of anhydrous ZnCl₂ and conc. HCl ?

• Trimethyl carbonyl

• Ethanol

• Propanol

• Methanol

The reagent with which both acetaldehyde and acetophenone react easily are :

• 2, 4-dinitrophenylhydrazine

• Fehling's solution

• Schiff's reagent

• Tollen's reagent

44.

Aniline first reacts with acetyl chloride producing compound' A'. 'A' reacts with nitric acid/ sulphuric acid mixture and produces compound 'B', which hydrolyses to compound 'C'. What is the identity of 'C' ?

• Acetanilide

• p-nitroacetanilide

• p-nitroaniline

• Aniline

Aniline on treatment with NaNO₂ in HCl at 0°C followed by treatment with alkaline β-naphthol gives:

• a violet solution

• a red solution

• a green solution

• a blue precipitate

Which one of the following is a co-polymer?

• Polyethylene

• Polyvinyl chloride

• Polytetrafluoroethylene

• Nylon-6,6

α and β glucose differ in the orientation of -OH group around:

• C₁

• C₂

• C₃

• C₄

Barbituric acid is used as :

• an antipyretic

• an antiseptic

• a tranquilizer

• an analgesic