Pyridine Synthesis and Properties Quiz

In Hantzsch synthesis, pyridine is obtained from:

• Aldehyde and ammonia

• Acetylene

• α,β-dicarbonyl compound, aldehyde, and ammonia

• Acetone and ammonia

Which of the following is used in the acetylene method of pyridine synthesis?

• Hydrogen peroxide

• Hydrogen cyanide

• Acetic acid

• Ethanol

Pyridine can be prepared by passing a mixture of:

• Ethylene and ammonia

• Acetylene and HCN

• Acetone and formaldehyde

• Benzene and HNO₃

What is the oxidation product of dihydropyridine in the Hantzsch synthesis?

• Pyrrole

• Piperidine

• Pyridine

• Nicotine

Pyridine is used as:

• A strong acid

• A catalyst and base

• Oxidizing agent

• Reducing agent

Pyridine is a denaturant for:

• Methanol

• Chloroform

• Ethanol

• Water

Pyridine is used in the synthesis of:

• Fertilizers

• Plastics

• Medicines

• Dyes only

Pyridine serves as a:

• Dehydrating agent

• Solvent in organic reactions

• Oxidizing agent

• Free radical initiator

Basicity of nitrogen in heterocycles is due to:

• Presence of hydrogen

• Aromaticity

• Lone pair availability for protonation

• Resonance energy

Kb value represents:

• Acid strength

• Solubility

• Basic strength

• Oxidation power