Chemical Process MCQ Questions & Answers

51

Cooking liquor in case of sulphite process is

A) Sodium sulphite and sodium bisulphite B) Magnesium sulphite and free SO₂ in acid medium C) Magnesium sulphate and magnessium bicarbonate D) None of these

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Answer & Solution

Answer: Option A

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52

The main component of pyrex glass is

A) Zinc B) Lead C) Boron D) Celenium

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Answer & Solution

Answer: Option B

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53

Main constituent of limestone is

A) CaCO₃ B) MgCO₃ C) Na₂CO₃ D) CaSO₄

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Answer & Solution

Answer: Option A

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54

Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at

A) 1 atm & 100°C B) 5 atm & 275°C C) 100 atm & 500°C D) 50 atm & 1000°C

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Answer & Solution

Answer: Option B

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55

Catalyst used in the hydrogenation of oil is

A) Nickel B) Platinum C) Iron D) Alumina

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Answer & Solution

Answer: Option A

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56

In the Lurgi coal gasifier

A) Coking coals cannot be used B) Low carbon conversion efficiency is achieved C) Entrainment of solids is higher D) Large quantity of coal can be processed

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Answer & Solution

Answer: Option D

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57

Use of chlorine in the treatment of sewage

A) Helps in grease separation B) Increases the biological oxygen demand(BOD) C) Causes bulking of activated sludge D) Aids in flocculation

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Answer & Solution

Answer: Option D

Solution:

The use of chlorine in the treatment of sewage Option D: Aids in flocculation.

Chlorine is often used in the treatment of sewage and wastewater as a disinfectant.
It helps in killing harmful bacteria and pathogens in the sewage, making it safer for disposal or discharge into water bodies.
One of the ways chlorine achieves this is by aiding in flocculation. Flocculation is the process of causing small particles in the sewage to come together and form larger, easily settleable particles called flocs.
These flocs can then be more effectively removed through sedimentation and filtration, leading to cleaner water.

So, the correct answer is Option D: Aids in flocculation.

58

Bleaching of paper pulp is done with

A) Activated clay B) Bromine C) Chlorine or chlorine dioxide D) Magnesium sulphite

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Answer & Solution

Answer: Option C

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59

__________ is produced using polycondensation reaction.

A) Polythene B) Phenol formaldehyde C) Poly vinyl chloride D) None of these

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Answer & Solution

Answer: Option B

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60

Flux addition during smelting of ore is done to

A) Remove impurities/gangue B) Enhance rate of reaction C) Accelerate reduction of ore D) Separate slag from metal

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Answer & Solution

Answer: Option A

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Chemical Process MCQ Questions & Answers | Chemical Engineering