Multiple choice

Which of the following pairs is not correct?

  1. Henna : Shikonin

  2. Madder : Alizarin

  3. Gallnut : Tannin

  4. Cutch : Catechin

  5. Logwood : Hematein
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Henna contains lawsone, a naphthoquinone compound, as a colouring agent. Shikonin is the principal colouring pigment of purple gromwell (Lithospermum erythrorhizon).

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