Synthetic Materials

6

The vast resources of unutilised natural gas can be used in the production of

A. graphite
B. Synthetic petroleum
C. fertilisers
D. carbide

7

Glass is made of the mixture of

A. quartz and mica
B. sand and silicates
C. salt and quartz
D. sand and salt

8

Deep blue colour is imparted to glass by the presence of

A. cupric oxide
B. nickel oxide
C. cobalt oxide
D. iron oxide

9

In vulcanisation, natural rubber is heated with

A. Carbon
B. Silicon
C. Sulphur
D. Phosphorous

10

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