Engineering Questions with Answers - Multiple Choice Questions
Unit Processes MCQ’s – Kinetics of Ammonolysis
1 - Question
Factors that affect the equilibrium?
a) Temperature of the system
b) Relative basicity of the amine
c) Solubility of the amine
d) All of the mentioned
View Answer
Explanation: the principal factors affecting the equilibriums are (1) the temperature of the system, (2) the relative basicity of the amine, and (3) the solubility of the amine.
2 - Question
Which of the following is an acid inhibitor?
a) Alkylamines
b) Secondary amines
c) Pyridine
d) All of the mentioned
View Answer
Explanation: Acid inhibitors (e.g., alkylamines, secondary amines, and pyridine).
3 - Question
What is the method to control the pH of autoclave charge?
a) copper-ammonio hydroxides
b) zinc-ammonio hydroxides
c) Copper-ammonio
d) Copper-Nickel hydroxides
View Answer
Explanation: There are two other useful methods of controlling the pH of the autoclave charge: the introduction of copper-ammonio hydroxides and the use of buffer salts, such as soap or chIorates, which are attacked and decomposed when the concentration of the hydracid is sufficiently great.
4 - Question
What is the nature of amination reaction?
a) Unimolecular
b) Bimolecular
c) Trimolecular
d) Polymolecular
View Answer
Explanation: The reaction is bimolecular in nature and involves the reaction of one molecule of ammonia with one molecule of the other reactant.
5 - Question
What do we denote reaction-rate constant as?
a) C
b) d
c) k
d) None of the mentioned
View Answer
Explanation: The reaction rate constant is denoted as ‘k’.
6 - Question
The reactions of ammonia and organic compounds are effected in which phase?
a) Vapour
b) Liquid
c) Both of the mentioned
d) None of the mentioned
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Explanation: Reactions of ammonia and organic compounds are effected in both vapour and liquid phases. The liquid-phase systems include anhydrous liquid ammonia, anhydrous ammonia in an organic diluent, and aqueous ammonia, occasionally in the presence of an organic solvent.
7 - Question
What product do we get on ammonolysis of ester?
a) Amine
b) Amide
c) Aniline
d) Azo
View Answer
Explanation: The ammonolysis of esters produces amide as its only product.
8 - Question
Complete the following reaction: R-COO-R’ + NH3 —–> _____ + HOR’.
a) R-CO-R’
b) R-COOH
c) R-C-NH2
d) R-CONH2
View Answer
Explanation: The reaction is ammonolysis of ester, which is: R-COO-R’ + NH3 —–> R-CONH2 + HOR’.
9 - Question
Greater the molecular weight, higher will be the rate of ammonolysis.
a) True
b) False
View Answer
Explanation: The greater the molecular weight and the more complex the alkyl or aryl group, the lower the rate of ammonolysis.
10 - Question
Ethylene glycol is a better catalyst than water in ammonolysis.
a) True
b) False
View Answer
Explanation: Ethylene glycol was found to be a better catalyst than water, which, in turn, was better than methanol, when their respective catalytic activities were compared at equivalent hydroxyl concentrations.
11 - Question
In the amine as solvent, the reaction rate is proportional to what?
a) Acid concentration
b) Alkaline concentration
c) Basic concentration
d) Catalytic concentration
View Answer
Explanation: In the amine as solvent, the reaction rate was proportional to the acid concentration.