Which of the following plants is used to extract the blue dye ?

Question

Which of the following plants is used to extract the blue dye ? (A) Trifolium (B) Indigofera (C) Lupin (D) Cassia

Tardigrade Admin · Accepted Answer

Indigo (blue dye) is obtained from the leaves of Indigofera tinctoria and I. suffruticosa. The leaves contain a colourless chemical which on exposure to air turns bluish.

Q. Which of the following plants is used to extract the blue dye ?

Trifolium

Indigofera

Lupin

Cassia

Indigo (blue dye) is obtained from the leaves of Indigofera tinctoria and $I$ . suffruticosa. The leaves contain a colourless chemical which on exposure to air turns bluish.