Engineering Questions with Answers - Multiple Choice Questions
Chemical Technology MCQ’s – Unit Process
1 - Question
Unit process involves changes in which of the mentioned? a) Physical changes b) Chemical Changes c) Both Physical and chemical changes d) None of the mentioned
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2 - Question
Which of the mentioned is an example of Unit process?
a) Melting of ice
b) Boiling of water
c) Boiling of egg
d) Cooling of water
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Explanation: Boiling of egg results in the hardening of the egg yolk and is irreversible change.
3 - Question
Ca(OH)2 + H2SO4 → CaSO4 + 2H2O is which type of reaction? a) Replacement
b) Decomposition
c) Addition
d) Double decomposition
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Explanation: Any reaction of the form AB + CD → AD + CB is said to be double decomposition.
4 - Question
The reaction CaO + H2O → CH3CH2OH is an example of ________
a) Hydration
b) Dehydration
c) Hydrogenation
d) Dehydrogenation
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Explanation: In the reaction one mole of water is being added to the reactant, Therefore it is hydration.
5 - Question
Which of the mentioned come under Unit process?
a) Hydrolysis
b) Isomerization
c) Esterification
d) All the mentioned
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Explanation: The given options all involve chemical reaction i.e making and breaking of bonds. Therefore, all of them mentioned are unit processes.
6 - Question
Which of the following description is apt for hydrolysis?
a) Addition of water molecule
b) Splitting of substance using water molecule
c) Removal of water
d) Removal of electrons
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Explanation: Hydrolysis is splitting of a compound using water molecule.
7 - Question
Isomerization is mostly used in which of the mentioned industries?
a) Petroleum
b) Soap
c) Pharmaceuticals
d) Fertilizer
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Explanation: Isomerization is a process in which long chain are reacted and then branched which improves octane no. of fuel.
8 - Question
Calcination is used primarily in which of the following industry?
a) Petroleum
b) Textile
c) Paper
d) Cement
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Explanation: Calcination is reaction in which limestone when heated gives CO2 and lime (CaO). Therefore, it is primarily used to cement industry.
9 - Question
Dyeing industry uses which of the mentioned process?
a) Diazotization and coupling
b) Hydroxylation
c) Oligomerization
d) Pyrolsis
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Explanation: Most of the dyeing industries involve diazotization and coupling of organic compounds to produce dyes like rosaniline etc.
10 - Question
Combustion falls under which of the below mentioned?
a) Unit process
b) Unit operation
c) Both unit operation and process
d) None of the mentioned
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Explanation: Combustion is burning of substance in the presence of oxygen in which chemical reaction occurs.