Chemistry of Intermediates & Colorants-I(Elective-I) — Winter 2018

Give the difference between dyes & pigments.

What is Coal? Explain carbonization of coal.

Give small scale preparation of benzene with suitable reactions?

Discuss the effect of substituents on the rate of Electrophilic Aromatic Substitution Reaction.

Explain the Synthesis of typical dyestuff intermediates based on benzene.

Explain the mechanism of Electrophilic Aromatic Substitution Reaction.

Explain the mechanism of Fridel Craft Alkylation involving carbocation rearrangement.

Discuss the Linear free energy relationship in terms of Hammet Substituent Constant.

Elaborate the mechanism of bromination of benzene.

Explain the following three types of forces between organicmolecules depend on the functional group present in order to increasing the strength:

Van der Waals forces (London Dispersion) (ii) Dipole-dipole interactions (iii) Hydrogen bonding

What is Pitch? What are the applications of pitch?

Discuss the Influence of Functional Groups on Reactivity of organic molecule.

Explain the mechanism of Nucleophilic Aromatic Substitution Reaction.

Write a short note on: Coal Tar Primaries.

Write a short note on: BON Acids.

Give the synthesis of Amino G-acid and Amino J-acid.

Write a short note on: Anthracene

Give the reactions of anthraquinone?

Explain Synthesis of Naphthol sulphonic acid with suitable chemical reaction?

Write a short note on : Onanthraquinone

What is meant by active methylene compound? Discuss about Enols with acid catalyzed enollzation reaction scheme.

Explain reversible conversion of a naphthol to a naphthylamine in the presence of ammonia and sodium bisulfite.1

Write a note on: Evolution of dyestuff chemistry.

Discuss the Michel Addition reactions of active methylene enolates.

Explain Bucherer Reaction with suitable chemical reaction?