Chemical Engineering and Environment MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Chemical Engineering and Environment, a fundamental topic in the field of Basic Chemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Chemical Engineering and Environment MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Chemical Engineering and Environment mcq questions that explore various aspects of Chemical Engineering and Environment problems. Each MCQ is crafted to challenge your understanding of Chemical Engineering and Environment principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Chemical Engineering and Environment MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Chemical Engineering and Environment. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Chemical Engineering and Environment knowledge to the test? Let's get started with our carefully curated MCQs!

Chemical Engineering and Environment MCQs | Page 24 of 31

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Q231.
The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the

a.

ionosphere

b.

troposphere

c.

stratosphere

d.

none of these

Discuss
Answer: (b).troposphere
Q232.
Biological oxidation ponds remove organic matters present in the polluted water by

a.

using the activities of bacteria and other micro organisms.

b.

aerobic oxidation.

c.

both (a) & (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) & (b).
Q233.
Which of the following is an adsorbant for removal of nitrogen oxides from gas/air ?

a.

Active carbon

b.

Silica gel

c.

Bog iron (iron oxide)

d.

Pulverised limestone

Discuss
Answer: (b).Silica gel
Q234.
Out of the following, TLV of __________ is the minimum (about 0.02 ppm).

a.

phosgene

b.

bromine

c.

MIC (methyl iso-cynate)

d.

ozone

Discuss
Answer: (c).MIC (methyl iso-cynate)
Q235.
Fluorosis is caused due to the presence of excessive amount of __________ in drinking water.

a.

mercury

b.

lead

c.

fluoride

d.

arsenic

Discuss
Answer: (c).fluoride
Q236.
Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes

a.

foaming

b.

odour nuisances

c.

undesirable plant growth

d.

turbidity

Discuss
Answer: (c).undesirable plant growth
Q237.
Pick out the wrong statement.

a.

Biological oxygen demand (BOD) is a characteristic and not a constituent of water.

b.

BOD is a measure of the amount of oxygen which will be demanded & used in 5 days by the biological decomposition of the organic matter present in water stream present as food for the living organism.

c.

BOD is expressed in mg/litre (typically, BOD=2.5 mg/litre for potable water).

d.

none of these

Discuss
Answer: (d).none of these
Q238.
The pH value of potable water should be between

a.

1 to 1.5

b.

6.5 to 8

c.

13 to 14

d.

4 to 5

Discuss
Answer: (b).6.5 to 8
Q239.
Maximum permissible limit of mercury in human blood is __________ micrograms/100 c.c.

a.

1

b.

7

c.

19

d.

82

Discuss
Answer: (b).7
Q240.
The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU).

a.

20

b.

230

c.

750

d.

1500

Discuss
Answer: (b).230
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