General Knowledge - General Science

Exercise :: General Science - Synthetic Materials

11. 

The major ingredient of leather is

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

Answer: Option A

Explanation:

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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

Explanation:

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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

Explanation:

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14. 

In vulcanisation, natural rubber is heated with

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

Answer: Option C

Explanation:

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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

Explanation:

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