Chemical Technology Questions and Answers – Synthetic Organic Chemical Industries – C2 Compounds

This set of Chemical Technology Questions and Answers focuses on “Synthetic Organic Chemical Industries – C2 Compounds”.

1. Ethylene can be obtained from ____________________
a) Calcium carbide
b) Partial oxidation of petroleum fractions
c) Hydrogen steam cracking
d) Thermal pyrolysis of ethane
View Answer

Answer: c
Explanation: Thermal pyrolysis of ethane is not a feasible method for producing ethylene. Acetylene can be obtained from calcium carbide and partial oxidation of petroleum fractions. Hydrogen steam cracking produces both ethylene and acetylene.

2. Which of the following statements are true?
a) Ethylene is highly soluble in water
b) Glycol is used in paint emulsions
c) Aromatics are not produced during steam cracking of hydrocarbons
d) Acetylene is more acidic than ethylene
View Answer

Answer: d
Explanation: Ethylene is slightly soluble in water. Glycol is used as antifreeze but not in paint emulsions. Some of the aromatics are produced as by-products in the steam cracking of hydrocarbons. Acetylene is more acidic than ethylene due to strong overlapping between s and p orbital’s.

3. Which distillation technique is used to separate butane, butylenes, and butadiene?
a) Fractional distillation
b) Vacuum distillation
c) Extractive distillation
d) Steam distillation
View Answer

Answer: c
Explanation: Extractive distillation is used when there is small difference between their boiling points. As butane, butylenes, and butadiene have close boiling points under pressure, they are separated using extractive distillation.

4. Catalyst used in the preparation of ethanol is _________________
a) Phosphoric acid
b) Sulfuric acid
c) Hydrochloric acid
d) Nitric acid
View Answer

Answer: d
Explanation: Synthetic ethanol is prepared by hydration of ethylene with phosphoric acid on celite catalyst.82% of ethanol produced is however manufactured using corn fermentation.

5. Catalyst used in manufacture of ethylene dichloride from ethylene and chlorine is __________
a) Hydrochloric acid
b) Ferric chloride
c) Propylene chloride
d) Poly chloroethane’s
View Answer

Answer: b
Explanation: Catalyst used in manufacture of ethylene dichloride from ethylene and chlorine is traces of ferric chloride or ethylene dibromide. These catalysts give 90-95% yield.
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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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