This set of Chemical Technology Multiple Choice Questions & Answers (MCQs) focuses on “Unit Process”.
1. 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
View Answer
Explanation: Any process which involves chemical changes is a unit process.
2. 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
View Answer
Explanation: Boiling of egg results in the hardening of the egg yolk and is irreversible change.
3. Ca(OH)2 + H2SO4 → CaSO4 + 2H2O is which type of reaction?
a) Replacement
b) Decomposition
c) Addition
d) Double decomposition
View Answer
Explanation: Any reaction of the form AB + CD → AD + CB is said to be double decomposition.
4. The reaction CaO + H2O → CH3CH2OH is an example of ________
a) Hydration
b) Dehydration
c) Hydrogenation
d) Dehydrogenation
View Answer
Explanation: In the reaction one mole of water is being added to the reactant, Therefore it is hydration.
5. Which of the mentioned come under Unit process?
a) Hydrolysis
b) Isomerization
c) Esterification
d) All the mentioned
View Answer
Explanation: The given options all involve chemical reaction i.e making and breaking of bonds. Therefore, all of them mentioned are unit processes.
6. 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
View Answer
Explanation: Hydrolysis is splitting of a compound using water molecule.
7. Isomerization is mostly used in which of the mentioned industries?
a) Petroleum
b) Soap
c) Pharmaceuticals
d) Fertilizer
View Answer
Explanation: Isomerization is a process in which long chain are reacted and then branched which improves octane no. of fuel.
8. Calcination is used primarily in which of the following industry?
a) Petroleum
b) Textile
c) Paper
d) Cement
View Answer
Explanation: Calcination is reaction in which limestone when heated gives CO2 and lime (CaO). Therefore, it is primarily used to cement industry.
9. Dyeing industry uses which of the mentioned process?
a) Diazotization and coupling
b) Hydroxylation
c) Oligomerization
d) Pyrolsis
View Answer
Explanation: Most of the dyeing industries involve diazotization and coupling of organic compounds to produce dyes like rosaniline etc.
10. 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
View Answer
Explanation: Combustion is burning of substance in the presence of oxygen in which chemical reaction occurs.
Sanfoundry Global Education & Learning Series – Chemical Technology.
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