This set of Unit Processes Multiple Choice Questions & Answers (MCQs) focuses on “Equipments for Hydrolysis”.
1. Which acid require serious consideration under acid hydrolysis?
a) Nitric acid
b) Sulphuric acid
c) Both HNO3 and H2SO4
d) None of the mentioned
View Answer
Explanation: Only two acids-sulfuric and hydrochloric-require serious consideration under acid hydrolysis.
2. Which is the most corrosive acid?
a) Sulphuric acid
b) Nitric acid
c) Hydrochloric acid
d) None of the mentioned
View Answer
Explanation: Hydrochloric acid as a hydrolyser and as a product of hydrolysis in the absence of alkali has been the source of much trouble as it is one of the most corrosive chemicals known.
3. Which of the following acts as a resistant against HCl?
a) Nickel
b) Aluminium bronze
c) Manganese bronze
d) All of the mentioned
View Answer
Explanation: Nickel and Monel metal are fairly resistant to low hydrochloric acid concentrations. With dilute acid, several of the copper-base alloys, such as phosphor bronze, aluminium bronze, manganese bronze, and Everdur metal, have fairly good resistance and can often be used in applications where corrosion can be offset by a heavy wall thickness.
4. Which of the following is an excellent non-metallic resistance to hydrochloric acid?
a) Rubber
b) Fused silica
c) Proflex
d) All the mentioned
View Answer
Explanation: Many non-metallic materials of construction, such as rubber, stoneware, fused silica, glass, and plastic materials such as Tygon and Proflex, have excellent resistance to hydrochloric acid.
5. It is difficulty to handling wet hydrochloric acid gas.
a) True
b) False
View Answer
Explanation: The difficulty of handling wet hydrochloric acid gas has been one of the retarding factors in the development of vapour-phase hydrolysis of organic halides, but the use of tantalum is finding favour in continuous processes involving large production.
6. Hydrochloric acid as what in absence of alkali?
a) Positive ion
b) Hydrolyser
c) Both positive ion and hydrolyser
d) None of the mentioned
View Answer
Explanation: Hydrochloric acid as a hydrolyser and as a product of hydrolysis in the absence of alkali has been the source of much trouble as it is one of the most corrosive chemicals known.
7. Which processes can be carried out in iron vessels?
a) Halogenated processes
b) Amide
c) Alkaline processes
d) All of the mentioned
View Answer
Explanation: Alkaline processes have, in general, the great advantage that, with rare exceptions, and they may be carried out in iron or steel vessels.
8. Which of the following is glycerol esters of fatty acids?
a) Halogenated
b) Sucrose
c) Oils
d) All of the mentioned
View Answer
Explanation: Oils and fats are glycerol esters of fatty acids, similar and dissimilar, saturated and unsaturated.
Sanfoundry Global Education & Learning Series – Unit Processes.
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