250+ TOP MCQs on C1 Compounds – Perchloroethylene and Answers

Chemical Technology Multiple Choice Questions on “C1 Compounds – Perchloroethylene”.

1. What is the molecular weight of per chloro ethylene?
a) 166
b) 165
c) 154
d) 152

Answer: a
Clarification: Molecular formula of tri chloro ethylene is Cl₂C=CCl₂. As it contains 4 chlorine atoms, and 2 carbon atoms the molecular weight is 35.5*4+12*2=166.

2. Per chloro ethylene is miscible with alcohols and ethers.
a) True
b) False

Answer: b
Clarification: Per chloro ethylene is slightly soluble in water and it is not miscible with water. It is miscible with ethers and alcohols. It is available in technical grade form only.

3. Which type of electrode furnace is used in pyrolysis of carbon tetrachloride?
a) Carbon electrode furnace
b) Zinc electrode furnace
c) Aluminum electrode furnace
d) Iron electrode furnace

Answer: a
Clarification: Carbon electrode furnace is used in pyrolysis of carbon tetra chloride. Pyrolysis products are hexa chloro ethane, per chloro ethylene, and chlorine along with unreacted carbon tetra chloride.

4. Which of the following is one of the pyrolysis products of CCl₄?
a) Tetra chloro ethane
b) Tri chloro ethane
c) Per chloro ethane
d) Hexa chloro ethane

Answer: d
Clarification: Hexa chloro ethane is one of the pyrolysis products of carbon tetra chloride. The other products are per chloro ethylene and chlorine with some unreacted carbon tetra chloride.

5. Which of the following statements regarding contact time in pyrolysis furnace design are true?
a) Hexa chlor yields are high at low contact time
b) Destructive formation of carbon takes place at low contact time
c) Hexa chlor yields are high, if the contact time is large
d) Destructive formation of light ends takes place when the contact time is low

Answer: a
Clarification: When the contact time is low, hexa chlor yields are high and when contact time is large, destructive formation of light ends and carbon takes place in pyrolysis furnace design.