Industrial Chemistry MCQs

Correct answer A. It is reduced to a soluble leuco form, absorbed by the fibre, then oxidised back in air

Correct answer A. It binds the dye to the fibre by forming an insoluble complex

Correct answer B. Disperse dyes

Correct answer A. Direct dyes

Correct answer C. Wool, silk and nylon

Correct answer C. They form covalent bonds with the hydroxyl groups of cellulose

Correct answer B. Chloroethene, CH₂=CHCl

Correct answer A. Water

Correct answer B. Starch paste

Correct answer A. –N=N–

Correct answer C. A group of atoms responsible for the colour, such as –N=N–

Correct answer B. Pressure-sensitive adhesive

Correct answer B. Hot-melt adhesive

Correct answer A. Polychloroprene (neoprene)

Correct answer A. Polyvinyl acetate (PVA)

Correct answer D. A cross-linked thermosetting polymer forms

Correct answer A. Traces of moisture on surfaces start their polymerisation