This set of Unit Processes Multiple Choice Questions & Answers (MCQs) focuses on “Equipments and Processes”.
1. Which of the following criteria is used for the selection of equipment?
a) Simplicity
b) Yield
c) Power load
d) All of the mentioned
View Answer
Explanation: The following criteria is undertaken for the selection of equipments: simplicity, yield, productivity, water balance, power load and by-product sludge.
2. By the reduction of which of the following, do we get p-phenylenediamine?
a) Para-nitroaniline
b) Para-aniline
c) Para-nitro amide
d) Aniline
View Answer
Explanation: When p-nitro aniline is reduced, we get p-phenylenediamine.
3. In which of the following process, do we remove iron oxide sludge in reduction of nitro-aniline?
a) Reduction process
b) Filtration
c) Dehydration
d) Vacuum distillation
View Answer
Explanation: Filtration of the reduction batch to remove iron oxide sludge.
4. Complete the reaction: RNO2 + 3Zn + 3H2SO4 ——-> RNH2 + 3______ + 2H2O.
a) H2SO4
b) NH2SO4
c) ZnSO4
d) None of the mentioned
View Answer
Explanation: RNO2 + 3Zn + 3H2SO4 ——-> RNH2 + 3ZnSO4 + 2H2O.
5. Which process is most feasible for the reduction of amines?
a) Zinc and acid
b) Tin and acid
c) Al and Sulphuric acid
d) All of the mentioned
View Answer
Explanation: This process is technically most feasible for the preparation of those amines which are insoluble at a pH lower than 5.0, so that the amine may be separated from dissolved zinc salts without resorting to a very elaborate isolation scheme such as extraction with organic solvents.
6. Which element is used for the hardening of oil and fats in food industry?
a) Hydrogen
b) Zinc
c) Sulphur
d) Nitrogen
View Answer
Explanation: Hydrogen is manufactured in large quantities for a variety of uses in addition to amination. It is used for hardening of oils and fats in the food industry, for the production of ammonia and methanol, for improving the octane number of gasoline, for the production of alcohols by the Oxo process and by reduction of fats and fatty acids, for the production of synthetic gasoline and lubricating oils, for the desulfurization of hydrocarbon materials, for providing reducing atmospheres in the metalworking industry, and for many other purposes in industrial synthetic organic chemistry.
7. The following reaction is representative of which process?
2H2 +O2 —–> 2H2O.
a) Hydrolysis process
b) Electrolytic process
c) Nucleophilic process
d) None of the mentioned
View Answer
Explanation: This reaction is widely used to produce hydrogen either as a main product or by- product, this known as Electrolysis process.
8. The dinitro compounds are insoluble in water and the diamines are quite soluble.
a) True
b) False
View Answer
Explanation: The dinitro compounds are insoluble in water and the diamines are soluble.
Sanfoundry Global Education & Learning Series – Unit Processes.
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