A) Indigo was extracted in India from plants of the 'Indigo ferra' group
B) The chemical structure of Indigo was determined by Baeyer, a German chemist who also synthesized it
C) Indigo is a dark blue solid soluble in water giving a blue solution
D) Indigo is fixed to fabrics by the vat process
Correct Answer: C
Solution :
Indigo is dark blue solid insoluble in water.
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