Engineering Questions with Answers - Multiple Choice Questions
Unit Processes MCQ’s -Types of Chlorination
1 - Question
Which type of chlorination is this reaction: CH3CHO + 3Cl2 ——-> CCL3CHO + 3HCl ?
a) Chlorination of Alkali
b) Chlorination of Acetaldehyde
c) Chlorination of Ethanol
d) Chlorination of Cycloparaffins
View Answer
Explanation: Chlorination of Acetaldehyde. In some commercial processes for chloral, acetaldehyde, or its condensation product, paraldehyde is chlorinated under hydrous conditions.
2 - Question
The Halogenated anthraquinones are derived from which reaction?
a) Friedel-Crafts reaction
b) Bechmann reaction
c) Olefins reaction
d) None of the mentioned
View Answer
Explanation: The halogenated anthraquinones are derived from the corresponding keto acids, which in turn are prepared according to the Friedel-Crafts reaction.
3 - Question
What do we get Chlorination of Carbon Disulphide?
a) Carbon Dichloride
b) Carbon Trichloride
c) Carbon Tetrachloride
d) None of the mentioned
View Answer
Explanation: Chlorination of Carbon Disulphide., the reaction is as follows CS2 + 3Cl2 —–> CCl4 + S2Cl2. , Hence we get Carbon Tetrachloride as product.
4 - Question
What is meant by a Catalytic chamber?
a) Reactor
b) Quenching tower
c) Cooling tower
d) None of the mentioned
View Answer
Explanation: A Catalytic tower is a type of a reactor tower, where catalytic reaction takes place.
5 - Question
CH2=CH2 + 2Cl2 + O2 ——–> _______ + 2H2O. Complete the following reaction?
a) CHCl=CHCl
b) CH2CL-CH2Cl
c) CH3-CH3
d) CCL3-CCL3
View Answer
Explanation: CH2=CH2 + 2Cl2 + O2 ——–> CHCl=CHCL + 2H2O, This reaction is used for the Preparation of Chlorolefins, here we use oxygen to convert any hydrogen chloride formed or introduced into active chlorine.
6 - Question
Alkyl halides and unsaturated aliphatic compounds cannot be simultaneously be obtained.
a) True
b) False
View Answer
Explanation: During Halogen Exchange reaction, the Alkyl halides and unsaturated aliphatic compounds can simultaneously be obtained by treating halogenated aliphatic carboxylic acids, nitriles, or esters with aliphatic alcohols and/or ethers in the temperature range 260-320°0 and 700 lb pressure. During the course of the reaction, hydrogen chloride is split out, the hydrogen and chlorine coming from adjacent carbon atoms. Under the conditions of reaction, the hydrogen chloride converts the reacting alcohol to the corresponding halide.
7 - Question
In the reaction, Acetylene in presence of what give us Tetrachloroethane?
a) Zinc
b) HgCl2
c) FeCl2
d) Al2O3
View Answer
Explanation: Acetylene in presence of FeCl2 give us Tetrachloroethane, and this reaction is known as Halogenated olefins.
8 - Question
For the reaction of Alkyl chloride in presence of Alc.KOH gives what in product?
a) Alkyl
b) Alkene
c) Alcohol
d) None of the mentioned
View Answer
Explanation: For example, when propylene dichloride is treated with an alcoholic solution of potassium hydroxide at ordinary temperatures, a-chloropropylene will be formed. Therefore in presence of Alcoholic KOH we convert Alkyl to Alkene (double bond).
9 - Question
What product do we get if Propylene Dichloride is reacted with aqueous KOH?
a) Alpha-chloropropylene
b) Beta-chloropropylene
c) All of the mentioned
d) None of the mentioned
View Answer
Explanation: When propylene dichloride is treated with an alcoholic solution of potassium hydroxide at ordinary temperatures, a-chloropropylene will be formed, but when reacted with alkali hydroxides at relatively high temperatures, the product consists largely of the b-chloro derivative.
10 - Question
Why do we need to add fresh catalyst regularly?
a) Faster reaction
b) More conversion
c) High yield
d) All of the mentioned
View Answer
Explanation: Fresh catalyst must be added periodically to maintain high conversion rates therefore high yield.