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Chemical Engineering - Chemical Process

Exercise : Chemical Process - Section 6
16.
Concentration of sulphide ores is done usually by
roasting
smelting
froth floatation
electro magnetic separation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Dacron is a/an
polyester
unsaturated polyster
polyamide
inorganic polymer
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Sodium carbonate (soda ash) is used in the manufacture of
fire extinguishers
sugar
baking powder
detergents
Answer: Option
Explanation:

Sodium carbonate, also known as soda ash, is not used in the manufacture of baking powder, detergents, or sugar. However, it is used in the manufacture of fire extinguishers, glass, soaps, and paper.

Sodium carbonate is used in a type of fire extinguisher called a soda-acid extinguisher. When the striker breaks a glass flask containing sulfuric acid, the sodium carbonate turns into sodium sulfate, which then breaks down into water and carbon dioxide.

19.
Viscose rayon
cannot be made from sulphite pulp.
utilises H2SO4, NaOH and CS2 during its manufacture.
cannot yield textile grade fibre.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Nylon 6-6 is manufactured from
hexamethylene diamine and adipic acid.
hexamethylene diamine and maleic anhydride.
caprolactum.
dimethyl terephthalate and ethylene glycol.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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