Synthetic Materials

11

What are the soaps?

A. Salts of silicates
B. Mixture of glycerol and alcohols
C. Sodium or potassium salts of heavier fatty acids
D. Esters of heavy fatty acids

12

The major ingredient of leather is

A. collagen
B. carbohydrate
C. polymer
D. nucleic acid

13

Optic fibres are mainly used for which of the following?

A. Musical instruments
B. Food industry
C. Weaving
D. Communication

14

Rayon is chemically

A. cellulose
B. pectin
C. glucose
D. amylase

15

Wood is the main raw material for the manufacture of

A. paint
B. paper
C. ink
D. gun powder