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Dive into the World of Dyes

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Questions and Answers

What gives the colour to a dye?

The part of light reflected back (correct)

The interaction with water and soap

The part of light absorbed

The exposure to alkalies

What are dyes capable of resisting?

Acidic and alkaline substances (correct)

Sunlight exposure

Action of water and soap

Physical wear and tear

Where were the early colouring materials extracted from?

Synthetic chemicals

Animals and synthetic sources

Minerals and rocks

Plants and insects (correct)

What is the modern method of producing colouring substances?

Synthesizing substances in factories Signup and view all the answers

What is a dye?

A coloured organic compound capable of absorbing light in the visible region of the electromagnetic spectrum and imparting color to textiles, foodstuffs, silk, wool, and other objects. Signup and view all the answers

How is the colour of a dye determined?

The colour of a dye is determined by the part of the light which is reflected back, which is complementary to the colour absorbed. Signup and view all the answers

What were the early sources of colouring materials?

In the early times, the colouring materials were extracted from natural sources like plants and insects. Signup and view all the answers

What are dyes capable of resisting?

Dyes are capable of getting fixed to fabrics/objects permanently and are resistant to the action of water, soap, light, acid, and alkalies. Signup and view all the answers