Synthetic Materials

Question 11 :

The major ingredient of leather is


A). collagen
B). carbohydrate
C). polymer
D). nucleic acid
Answer : Option A

Question 12 :

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
Answer : Option C

Question 13 :

How does common salt help in separating soap from the solution after saponification?


A). By decreasing density of Soap
B). By decreasing solubility of Soap
C). By increasing density of Soap
D). By increasing solubility of Soap
Answer : Option B

Question 14 :

In vulcanisation, natural rubber is heated with


A). Carbon
B). Silicon
C). Sulphur
D). Phosphorous
Answer : Option C

Question 15 :

Deep blue colour is imparted to glass by the presence of


A). cupric oxide
B). nickel oxide
C). cobalt oxide
D). iron oxide
Answer : Option C