This set of Unit Processes Multiple Choice Questions & Answers (MCQs) focuses on “Liquid Phase Oxidation with Oxygen”.
1. The formation of acetic acid through oxidation is done in which phase?
a) Vapour
b) Liquid
c) Solid
d) All of the mentioned
View Answer
Explanation: Acetaldehyde to Acetic Acid, the formation of acetic acid furnishes an excellent example of liquid-phase oxidation with molecular oxygen.
2. Direct oxidation of ethanol produces what?
a) Acetic acid
b) Carboxylic acid
c) Aldehyde
d) Alcohols
View Answer
Explanation: Acetic acid may be obtained by the direct oxidation of ethanol, but the concentrated acid is generally obtained by oxidation methods from acetaldehyde that may have been formed by the hydration of acetylene or the oxidation of ethanol.
3. What product(s) are produced on oxidation of fatty oils by peracetic acid?
a) Epoxidized
b) Hydroxylated
c) Acetylated
d) All of the mentioned
View Answer
Explanation: Oxidation of fatty oils by peracetic acid results in products which arc epoxidized, hydroxylated, and acetylated and have properties of value for use in vinyl plasticizers and greases.
4. Which of the following acts as a promoter in oxidation of aliphatic hydrocarbon?
a) Mn
b) Co
c) Mg
d) Ce
View Answer
Explanation: various liquids as solvents, preferably organic acids relatively inert to oxidation; catalysts such as salts of Ce, Co, Cu, Mn, V, U, Fe; plus promoters such as salts of Ba, Mg, Ki plus “initiators” such as peroxides, peracids, aldehydes, ketones, olefins, or organic substances forming peroxides.
5. Which of the following soaps are used for the manufacture of lubricating greases?
a) Sodium
b) Lithium
c) Sodium and Lithium
d) None of the mentioned
View Answer
Explanation: Sodium and lithium soaps of these acids have been described as promising for the manufacture of lubricating greases.
6. The oxidation of aliphatic- or alkyl-substituted aromatics is extremely corrosive.
a) True
b) False.
View Answer
Explanation: The oxidation mass in processes such as the above applied to either aliphatic- or alkyl-substituted aromatics is extremely corrosive.
7. Which of the following acts as a raw material for the manufacturing of adipic acid?
a) Phenol
b) Cyclohexane
c) Benzene
d) Propane
View Answer
Explanation: Petroleum-derived cyclohexane is the significant commercial raw material for adipic acid manufacture, cyclohexane may be converted by oxidation to adipic acid by either of two basically different processes.
8. What is the organic name of Cumene?
a) Propylene
b) Isopropylene
c) Benzoyl
d) Isopropylbenzene
View Answer
Explanation: Isopropylbenzene is also called cumene.
9. The formation of fatty acids suitable for the production of what?
a) Soaps
b) Esters
c) Fats
d) All of the mentioned
View Answer
Explanation: Oxidations has centered quite largely in the formation of fatty acids suitable for the production of soaps, fats, esters, solvents, etc., or capable of hydrogenation to high-molecular-weight alcohols.
10. Oxidation of cyclohexane in presence of solid catalysts results in complete combustion.
a) True
b) False
View Answer
Explanation: Single-stage vapour-phase air oxidation of cyclohexane in presence of solid catalysts results in complete combustion, whereas without catalysts aldehydes constitute the major products.
Sanfoundry Global Education & Learning Series – Unit Processes.
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