250+ TOP MCQs on Technical Preparations and Answers

Unit Processes Multiple Choice Questions on “Technical Preparations”.

1. What is the formula of formaidehyde-bisulfite ?
a) HOCH₂SO₃Na
b) CH₃SO₃Na
c) HOCH₂SO₄
d) HOCH₃SO₂Na
Answer: a
Clarification: formaidehyde-bisulfite also called as “sodium hydroxymethanesulfonate” also, has the following formula HOCH₂SO₃Na.

2. What is the use of Lauryl sulphate?
a) Foaming agent
b) Cleaning agent
c) Drying agent
d) Wetting agent
Answer: a
Clarification: Lauryl sulphate is used in soap because of its excellent detergent quality and foaming properties.

3. What is the other name of Dodecylbenzene?
a) Alkyl benzene
b) Detergent alkylate
c) Benzoate alcohol
d) None of the mentioned
Answer: b
Clarification: Detergent alkylate is also called Dodecylbenzene.

4. The quinone is sulfonated with 20 per cent oleum in the presence of which catalyst?
a) Mercury sulfate
b) Magnesium sulfate
c) Chlorine
d) Zinc sulphate
Answer: a
Clarification: Anthraquinone-I-sulfonate (Potassium Salt), the quinone is sulfonated with 20 per cent oleum in the presence of mercury sulfate catalyst.

5. Acetanilide is reacted with chlorosulfonic acid to yield what?
a) Sulfonyl acetate
b) Sulfonyl anilide
c) Sulfonyl chloride
d) None of the mentioned
Answer: c
Clarification: The Chlorosulfonation of Acetanilide, here Acetanilide is reacted with chlorosulfonic acid to yield the sulfonyl chloride, which is used as an intermediate for nearly all sulpha drugs.

6. Aniline sulfate is converted to sulfanilic acid by “baking”.
a) True
b) False
Answer: a
Clarification: Sulfanilic Acid from Aniline, here Aniline sulfate is converted to sulfanilic acid by “baking”, the following reaction is : H₂NC₆H₅-H₂SO₄ ——> H₂NC₆H₅SO₃H + H₂0.

7. Complete the following reaction: (CH₃)₂O + SO₃ ——> _______ .
a) (CH₃)₂SO
b) (CH₃)₂SO₂
c) (CH₃)₂SO₃
d) (CH₃)₂SO₄
Answer: d
Clarification: The process is know as Sulfation of Dimethyl Ether with SO3, and the reaction is: (CH₃)₂O + SO₃ ——> (CH₃)₂SO₄.

8. The production of Ethanol from Ethylene is done in which type of process?
a) Batch process
b) Continuous process
c) Semi batch process
d) All of the mentioned
Answer: b
Clarification: The process operates under fully continuously process.

9. The conversion of Ethylene to Ethanol is which type of reaction?
a) Exothermic
b) Endothermic
c) Neutral
d) None of the mentioned
Answer: a
Clarification: The conversion of ethylene to ethanol is highly exothermic, therefore there is a need to use heat exchangers.