Engineering Questions with Answers - Multiple Choice Questions
Unit Processes MCQ’s – Types of Oxidative Reactions
1 - Question
Dehydrogenation is not an oxidative reaction.
a) True
b) False
View Answer
Explanation: Dehydrogenation is an oxidative reaction as Oxygen is added to the compound and hydrogen is removed.
2 - Question
Preparation of aldehydes from alcohols is done in which reaction?
a) Addition of O2
b) Replacement reaction
c) Dehydrogenation reaction
d) All of the mentioned
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Explanation: Dehydrogenation is a primary method to convert alcohols to aldehydes.
3 - Question
Complete the following reaction: CH3CH0 + 0.5 O2 —–>______.
a) CH4
b) CH3CHO
c) CH3COOH
d) None of the mentioned
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Explanation: In this reaction an atom of oxygen may be introduced into a molecule, such as: CH3CH0 + 0.5 O2 —–> CH3COOH.
4 - Question
Is a combination of dehydrogenation and introduction of oxygen possible?
a) Yes
b) No
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Explanation: A combination of dehydrogenation and introduction of oxygen is done as in the preparation of aldehydes from hydrocarbons: CH4 + O2 ——> CH2O + H20.
5 - Question
Which of the following is an oxidizing agent?
a) KMnO4
b) NaOH
c) CO
d) All of the mentioned
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Explanation: All of the following acts as catalyst or can be used directly for oxidization.
6 - Question
Oleic acid can be converted to dihydroxystearic acid in presence of what?
a) NaOH
b) KMnO4
c) H2O
d) CO
View Answer
Explanation: Oleic acid can be converted to dihydroxystearic acid in presence of alkaline potassium permanganate (KMnO4).
7 - Question
Conversion of Benzoyl Chloride to Benzoyl Peroxide is called which oxidative reaction?
a) Dehydrogenation
b) Direct O2 addition
c) Peroxidation
d) Combine oxidation
View Answer
Explanation: In peroxidation, require the interaction of an inorganic peroxide, therefore converting Benzoyl Chloride to Benzoyl Peroxide.
8 - Question
Amino compounds may be oxidized to which compound(s)?
a) Azobenzene
b) Para-amino-phenol
c) Nitrobenzene
d) All of the mentioned
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Explanation: Amino compounds may be oxidized to azobenzene, p-amino-phenol, or nitrobenzene under moderate conditions, or the N-containing radical may be completely removed under drastic conditions.
9 - Question
Sulphur compounds may be oxidized by which acid?
a) Permanganate
b) Hydroxide
c) Oxygen
d) All of the mentioned
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Explanation: Sulphur compounds may be oxidized by acid permanganate, as in the preparation of sulfonals, trionals, and tetranals.
10 - Question
Oxidation of aldehydes give what?
a) Alcohols
b) Carboxylic acid
c) Amide
d) Peroxide
View Answer
Explanation: As oxidation of alcohols gives aldehyde, similarly oxidation of aldehyde gives carboxylic acid.