Engineering Questions with Answers - Multiple Choice Questions
Unit Processes MCQ’s – Oxidizing Agents – 1
1 - Question
Permanganate is a mild oxidizing agent.
a) True
b) False
View Answer
Explanation: The solid salts of permanganic acid are powerful oxidizing agents. Calcium permanganate induces such rapid oxidation of ethanol that inflammation may result.
2 - Question
Permanganate can be used as an oxidizing agent for which compound?
a) Alkaline
b) Neutral
c) Acid solutions
d) All of the mentioned
View Answer
Explanation: Permanganate functions as an oxidizing agent of different strengths in alkaline, neutral, and acid solutions.
3 - Question
Which salt is used as an oxidation of complex for proteins?
a) Sodium salts
b) Calcium salts
c) Both of these
d) None of the mentioned
View Answer
Explanation: The calcium and barium salts have been used for the oxidation of complex proteins. The calcium salt has the advantage in that it forms insoluble products.
4 - Question
When potassium permanganate is used in aqueous solution, the solution becomes what?
a) Alkaline
b) Acidic
c) Neutral
d) None of the mentioned
View Answer
Explanation: When potassium permanganate alone is used in aqueous solution, the solution becomes alkaline through the formation of potassium hydroxide.
5 - Question
What is the order of the oxidation of aromatic hydrocarbons with potassium permanganate?
a) Zero order
b) First order
c) Second order
d) None of the mentioned
View Answer
Explanation: Kinetic studies of the oxidation of aromatic hydrocarbons with potassium permanganate show that reaction is first order with respect to each reactant.
6 - Question
In neutral solution, what is the need of CO2 in the oxidation?
a) Acidify
b) Basicity
c) Neutralise
d) None of the mentioned
View Answer
Explanation: Neutral Solution. To avoid the alkalinity produced by the use of potassium permanganate alone as an oxidizing agent, resort may be had to the introduction of carbon dioxide to neutralize the alkali.
7 - Question
What is the use of addition of acetic or sulfuric acid to KMnO4 solutions?
a) Neutralise
b) Alkaline
c) Oxidise
d) Acidity
View Answer
Explanation: The addition of acetic or sulfuric acid to potassium Permanganate solutions yields a powerful oxidizing agent useful only in the preparation of very stable compounds.
8 - Question
Which of the following is an oxidizing agent?
a) NaOH
b) CrO3
c) Cl2
d) H2O
View Answer
Explanation: Chromic anhydride, CrO3, dissolved in glacial acetic acid, is sometimes used as an oxidizing agent.
9 - Question
Chromic acid and the dichromate’s have numerous applications in the organic chemical industry.
a) True
b) False
View Answer
Explanation: Chromic acid and the dichromate find numerous other applications as oxidizing agents in the organic chemical industry. In the manufacture of perfumes, they may be used to oxidize anethole to anisic aldehyde, isosafrol to piperonal (heliotropin), etc.
10 - Question
Chlorinated solutions of which hydroxides are active oxidizing agents?
a) Sodium
b) Aluminium
c) Copper
d) All of the mentioned
View Answer
Explanation: Chlorinated solutions of zinc and aluminium hydroxides are more active oxidizing agents than are comparably treated solutions of the alkalis or alkaline earths because of greater hydrolysis and consequent more rapid decomposition of hypochlorous acid
11 - Question
Hypochlorous acid is unstable.
a) True
b) False
View Answer
Explanation: Hypochlorous acid is unstable and decomposes very easily to liberate oxygen.
12 - Question
What is the NaClO3 called?
a) Sodium chlorine
b) Sodium oxidechloro
c) Sodium chlorite
d) All of the mentioned
View Answer
Explanation: Sodium chlorite has a formula: NaClO3.
13 - Question
Why cannot Chlorine dioxide be stored?
a) Unstable
b) Solid form
c) Liquid form
d) All of the mentioned
View Answer
Explanation: Chlorine dioxide is a powerful oxidizing and bleaching agent; but because of its instability, it cannot be produced and stored.