ECAT Pre Engineering Chemistry Chapter 27 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

Try The MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

  • Total Questions30

  • Time Allowed30

Start Test Download PDF

ECAT Chemistry Chapter 27 Environmental Chemistry

00:00
Question # 1

UV radiations bring about

Question # 2

Which factor is helping to reduce the environmental pollution

Question # 3

The normal amount of overhead ozone is about

Question # 4

BOD is

Question # 5

Drained sewage has B.O.D

Question # 6

The % of CO2is the atmosphere is

Question # 7

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 8

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 9

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 10

The largest item which is recycled is

Question # 11

Biodegradable pollutant is

Question # 12

In Antarctica ozone depletion is due to the formation of following compound

Question # 13

Domestic waste mostly constitutes

Question # 14

Which of the following waste material is not recycled for use again

Question # 15

When chlorofluoro carbon are subjected to U.V. they form

Question # 16

Chief source of water and soil pollution is

Question # 17

The amount of oxygen in the lithosphere is about

Question # 18

Chloroflurocarbon releases a chemical harmful to ozone

Question # 19

Ecosystem is a smaller unit of

Question # 20

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 21

Oceans cove ______ percent of the surface of the earth

Question # 22

Carbon monoxide is pollutant as it

Question # 23

Chromium (VI) is highly toxic and can cause

Question # 24

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 25

Chromium (VI) is highly toxic and can cause

Question # 26

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 27

Acid rain is due to increase in atmospheric concentration of

Question # 28

Ultraviolet radiation from sun causes a reaction that produces

Question # 29

Which is not a component of environment

Question # 30

The pH range of the acid rain is

Submit

Prepare Complete Set Wise ECAT Chemistry Chapter 27 Environmental Chemistry MCQs Online With Answers


Topic Test

00:00
Submit

Top Scorers Of ECAT Chemistry Chapter 27 Environmental Chemistry MCQ`s Test

  • F
    Farzand Shah Farzand Shah 10 - Apr - 2024 03 Min 00 Sec 120/120
  • T
    Tanzeel Ur Rehman 28 - May - 2024 04 Min 15 Sec 115/120
  • M
    M Umer Arain 24 - Dec - 2024 00 Min 04 Sec 110/120
  • A
    Alyna Fatima 25 - Mar - 2024 03 Min 12 Sec 110/120
  • S
    Sarosh Amjad 21 - Jan - 2025 03 Min 44 Sec 110/120
  • A
    Abid Ali 19 - May - 2024 10 Min 33 Sec 110/120
  • A
    Alyna Fatima 25 - Mar - 2024 03 Min 28 Sec 105/120
  • Z
    Zainab Tahira 14 - Jun - 2026 03 Min 29 Sec 104/120
  • Z
    Zaman Shehzad 24 - May - 2024 09 Min 53 Sec 95/120
  • M
    Muhammad Uzair 05 - Jun - 2024 03 Min 33 Sec 90/120
  • Z
    Zargaii 92 29 - May - 2024 06 Min 59 Sec 90/120
  • C
    Cricket Expert's 27 - May - 2024 03 Min 01 Sec 85/120
  • M
    Muhammad Saleem 06 - Dec - 2024 13 Min 11 Sec 85/120
  • T
    tayyab ali 20 - May - 2024 19 Min 22 Sec 80/120
  • C
    Computer mail 10 - Feb - 2026 07 Min 01 Sec 76/120

ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Ozone layer of stratosphere requires protection from indiscriminate use of
A. Fungicides, insecticides, bactericides and medicines
B. Aerosols and high flying jets
C. Atomic explosions and industrial wastes
D. Baloons and turbo-prop aeroplanes
2 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
3 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
4 Fungicides are the pesticides which
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
5 Ozone in most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
6 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these
7 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
8 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
9 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically
10 Increased asthmatic attacks in certain seasons are related to
A. Inhalation of seasonal pollen
B. Eating of seasonal vegetables
C. Low temperature
D. Wet and dry environment

Test Questions

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!