Engineering Questions with Answers - Multiple Choice Questions
Unit Processes MCQ’s – Aminating Agents-SO3H
1 - Question
Which compound would have the highest reactivity?
a) Primary
b) Secondary
c) Tertiary
d) All of the mentioned
View Answer
Explanation: As branching increases in a hydrocarbon molecule, reactivity decreases, as branching produces hindrances.
2 - Question
Complete the following reaction: C14H7O2.SO3H + NH3 —–> C14H7O2.NH2 + _____
a) HSO4
b) H2SO3
c) H2SO4
d) None of the mentioned
View Answer
Explanation: The following reaction shows the replacement of – SO3H by NH2: C14H7O2.SO3H + NH3 —–> C14H7O2.NH2 + H2SO3.
3 - Question
In Ammonlysis of aminoalkyl hydrogen sulfate, taurine is obtained by the preferential replacement of which group?
a) Hydroxyl
b) Benzoate
c) Aniline
d) None of the mentioned
View Answer
Explanation: Taurine is obtained by the preferential replacement of the hydroxyl group.
4 - Question
What product do we get when ethylenediamine replaces ammonia as the aminating agent?
a) Ethyleneamine
b) Ethylenediamine
c) Diethylenetriamine
d) Diethylenediamine
View Answer
Explanation: When ethylenediamine replaces ammonia as the aminating agent, diethylenetriamine is the principal product.
5 - Question
Which of the following is not a method for the preparation of Alkylamines?
a) Ammonolysis of alcohols
b) Hydroammonolysis of alcohols
c) Hydroammonolysis of aldehydes
d) None of the mentioned
View Answer
Explanation: The methods for the preparation of alkylamines are : (1) ammonolysis of alcohols over alumina catalysts, (2) hydroammonolysis of alcohols over hydrogenation catalysts, and (3) hydroammonolysis of aldehydes, ketones, and carboxylic acids
6 - Question
What are the requirements to control the production of specific amines?
a) Ratio of reactants
b) Operating conditions
c) Specific catalyst
d) All of the mentioned
View Answer
Explanation: The control of production of specific amines in conformity with commercial requirements is made by a proper choice of ratio of reactants and operating conditions, the use of specific catalysts, and the recycling of undesired products.
7 - Question
Continuous vapor-phase reactions cannot be used for the preparation of lower alkylamines.
a) True
b) False
View Answer
Explanation: Continuous vapor-phase reactions are used for the preparation of lower alkylamines, while both liquid- and vapour-phase techniques are employed for the higher-molecular-weight amines.
8 - Question
The amination of alkyl halides produce which type of amines?
a) Primary
b) Secondary
c) Tertiary
d) All of the mentioned
View Answer
Explanation: The amination of alkyl halides, the product of reaction may comprise primary, secondary, and tertiary amines, depending on the specific alcohol, the NH3 ratio, and other conditions employed.
9 - Question
The amines of the high-molecular-weight fatty alcohols are best prepared in ________ condition?
a) Pressure system
b) Temperature system
c) Enthalpy system
d) All of the mentioned
View Answer
Explanation: The amines of the high-molecular-weight fatty alcohols are best prepared in a pressure system.
10 - Question
The lower aliphatic alcohols produce nitriles in presence of which catalyst?
a) Oxidation
b) Hydrogenation
c) Reduction
d) Dehydrogenation
View Answer
Explanation: When the lower aliphatic alcohols are treated with ammonia in the vapor phase in the presence of a hydrogenation catalyst, nitriles are obtained as the principal product.