Textile and dye

An azo dye is fixed on fabrics by the process applicable in

• Vat dye

• Mordant dye

• Developed dye

• Substantive dye

Red ink is prepared from

• Phenol

• Aniline

• Congo red

• Eosin

The blue print process involves the use of

• Indigo dyes

• Vat dye

• Iron compounds

• Zinc compounds

An azo dye is formed by interaction of an aromatic diazonium chloride with

• Nitrous acid

• A phenol

• Benzene

• An aliphatic primary amine

Alizarin belongs to the class of

• Reactive dyes

• Substantive dyes

• Mordant dyes

• Vat dyes

An insoluble coloured compound formed by action of metallic salts on dyes is known as

• None of these

• Dye intermediate

• Mordant

• Lake

Alizarin dye obtained from the root of madder plant is anthraquinone derivative. Its structure

corresponds to

• 1-hydroxy anthraquinone

• 1, 4-dihydroxy anthraquinone

• 1, 2-dihydroxy anthraquinone

• None of these

To which class of dyes does phenolphthalein belong

• Phthalein dyes

• Nitro dyes

• Triphenyl methane dyes

• Azo dyes

Alizarin a mordant dye is not used in

• Chromium lakes for wood dyeing

• Painting

• Printing

• Cotton dyeing

The rose odour from an ester is formed by the action of HCOOH on

• Turpentine oil

• Olive oil

• Geraniol

• Pine oil