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Chemical Engineering - Chemical Process

Exercise : Chemical Process - Section 12
11.
Commercial production of calcium carbide requires limestone and __________ as raw materials.
coke
sand
soda ash
fuel oil
Answer: Option
Explanation:

Commercial production of calcium carbide requires limestone and coke (a form of processed coal) as raw materials.

The production process involves heating a mixture of limestone and coke in an electric arc furnace to a temperature of about 2000 °C. This results in a chemical reaction between the limestone and coke, which produces calcium carbide and carbon dioxide as by-products.

Calcium carbide is an important industrial chemical, widely used in the production of acetylene gas, which is used as a fuel and a chemical building block. It is also used in the production of other chemicals, such as acetic acid and PVC.

The raw materials used to produce calcium carbide are relatively inexpensive and widely available, making it a cost-effective chemical to produce on a large scale.

12.
Which one of the following is not likely to be a constituent of vegetable oils ?
Citric acid
Oleic acid
Stearic acid
Glycerol
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and
sulphuric acid
phosphoric acid
hydrochloric acid
hydroflouric acid
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The process involved in converting rubber into a thin sheet or coating it on fabric is called
extrusion
mastication
calendering
valcanisation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
endothermic
exothermic
irreversible
both (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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