Engineering Questions with Answers - Multiple Choice Questions
Chemical Technology MCQ’s – C1 Compounds – Trichloroethylene
1 - Question
What is the molecular weight of tri chloro ethylene?
a) 131.5
b) 130.5
c) 129.5
d) 120.5
View Answer
Explanation: Molecular formula of tri chloro ethylene is ClHC=CCl2. As it contains 3 chlorine atoms, 2 carbon atoms, and 1 hydrogen atom the molecular weight is 35.5*3+12*2+1*1=131.5.
2 - Question
Tri chloro ethylene is highly soluble in water. Is the statement true/false?
a) True
b) False
View Answer
Explanation: Tri chloro ethylene is not highly soluble but slightly soluble in water. It is miscible with ethers and alcohols. It is available in different grades like technical, extraction etc.
3 - Question
Which catalyst is used in the reaction of acetylene and chlorine producing tetra chloro ethane?
a) Barium chloride
b) Ferric chloride
c) Hydrogen chloride
d) Calcium chloride
View Answer
Explanation: Ferric chloride is used as catalyst in the reaction of acetylene and chlorine to give tetra chloro ethane whereas barium chloride is used as catalyst in the reaction to produce tri chloro ethylene from tetra chloro ethane.
4 - Question
Acid free grade of tri chloro ethylene is known as _______________
a) Extraction
b) Technical
c) Industrial
d) Tri-chlor
View Answer
Explanation: Acid free grade of tri chloro ethylene is known as tri-chlor whereas high purity grade is called technical grade and non-acid grade is called extraction grade, industrial grade is not present.
5 - Question
Which of the following chemical reaction is true?
a) C2H2+2Cl2BaCl2−→−−−C2H2Cl2
b) C2H2+2Cl2BaCl2−→−−−C2H2Cl4
c) C2H2Cl4BaCl2−→−−−C2HCl3+HCl
d) C2H2Cl4FeCl3−→−−−C2HCl3+HCl
View Answer
Explanation: The correct chemical equation is C2H2Cl4BaCl2−→−−−C2HCl3+HCl as Ferric chloride is used as catalyst in the reaction of acetylene and chlorine to give tetra chloro ethane whereas barium chloride is used as catalyst in the reaction to produce tri chloro ethylene from tetra chloro ethane.