Engineering Questions with Answers - Multiple Choice Questions
Unit Processes MCQ’s – Liquid Phase Oxidation with Oxidizing Compounds
1 - Question
The action of oxidizing agents on organic compounds depends what?
a) Temperature
b) Nature of agent
c) Concentration of reactant
d) All of the mentioned
View Answer
Explanation: The action of oxidizing agents on organic compounds depends not only upon the nature of the agent or the compound but also upon such factors as concentration, temperature, hydrogen-ion concentration, and method of mixing.
2 - Question
Hydrogen peroxide oxidizes which type of organic compounds?
a) Saturated
b) Unsaturated
c) Aromatic
d) None of the mentioned
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Explanation: Hydrogen peroxide in the presence of catalysts of the oxides of Ru, V, Cr, or Mo also oxidizes organic unsaturated compounds to glycols.
3 - Question
Nitrobenzene is which type of potent agent?
a) More
b) Less
c) Both More or Less
d) None of the mentioned
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Explanation: Less potent agents, such as nitrobenzene, have consequently been used for the direct oxidation of isoeugenol to vanillin. Nitrobenzene has an advantage over more powerful oxidizing agents, such as the dichromates and permanganates, in the oxidation.
4 - Question
Which acid is used for the production of synthetic camphor from turpentine?
a) Nitric acid
b) Sulphuric acid
c) Hydrochloric acid
d) None of the mentioned
View Answer
Explanation: Nitric acid has been widely used in the production of synthetic camphor from turpentine.
5 - Question
Which agent can be used to oxidize aniline to Quinone?
a) NaOH
b) KMnO4
c) H2O
d) CO
View Answer
Explanation: Sodium or potassium dichromate may be used to oxidize aniline to quinone, but a low temperature and slow addition of the oxidizing agent must be employed in order to restrict the action.
6 - Question
Is the reaction Oxidation of aniline with Mn02-H2S04 mixtures possible?
a) Yes
b) No
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Explanation: Oxidation of aniline with Mn02-H2S04 mixtures is claimed to give 73 percent yield of quinone.
7 - Question
Quinone cannot be readily reduced to hydroquinone.
a) True
b) False
View Answer
Explanation: Quinone is readily reduced to hydroquinone, and much of the quinone that is manufactured is sold in the form of the hydrogenated product.
8 - Question
Hydroquinone can be readily oxidized to quinone by which type of agents?
a) Chlorine
b) Nitric acid
c) Persulfuric acid
d) All of the mentioned
View Answer
Explanation: Hydroquinone, in turn, is readily oxidized to quinone by such agents as chlorine, nitric acid, persulfuric acid, chromic acid, ferric chloride, and permanganates.
9 - Question
Reduction of quinone to hydroquinone is a reversible process.
a) True
b) False
View Answer
Explanation: The reduction of quinone to hydro quinone and the reoxidation of hydroquinone to quinone are very rapid processes and are strictly reversible. This reaction is one of the rare oxidation and reduction reactions of organic chemistry that are rapid and reversible.
10 - Question
Which oxide is used for the oxidation of Toluene?
a) Sodium hydroxide
b) Aluminium oxide
c) Manganese dioxide
d) Hydroxide
View Answer
Explanation: The use of manganese dioxide for the oxidation of toluene to benzaldehyde and benzoic acid was formerly extensive.