Question

Woda is used for making
a) Violet dyes
b) Blue dyes
c) Both a and b
d) None of these

Answer 1

Answer:

none of these

Explanation:

because sodium bicarbonate is formed by mixing carbon,sodium, hydrogen and oxygen molecules. this mixture is also known as baking soda, is actually a type of salt.

Answer 2

Option B is the correct answer.

• The procedure of colouring with woad is identical to colouring with the indigo plant. The colour comprised in the leaves is not soluble in water, so to be melted, it must endure a chemical modification - reduction. Initially eliminated from the dye bowl, it incorporates oxygen in the air and relapses to the insoluble blue.
• To earn the blue colour from woad, it is significant to borrow leaves from the plant's early summer. Harvest the leaves in delayed July and August, preferably during a warm period.

Hence, option B blue dye is the correct answer.