11.
The major ingredient of leather is
A. collagen B. carbohydrate
C. polymer D. nucleic acid
Answer & Explanation
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 & Explanation
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 & Explanation
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 & Explanation
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 & Explanation
Answer: Option C
Explanation:
No answer description available for this question