250+ TOP MCQs on Unit Process and Answers

Chemical Technology Multiple Choice Questions 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

Answer: b
Clarification: 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

Answer: c
Clarification: 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

Answer: d
Clarification: 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

Answer: a
Clarification: 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

Answer: d
Clarification: 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

Answer: b
Clarification: 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

Answer: a
Clarification: 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

Answer: d
Clarification: 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

Answer: a
Clarification: 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

Answer: a
Clarification: Combustion is burning of substance in the presence of oxygen in which chemical reaction occurs.