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Top Scorers Of MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test MCQ`s Test

M

Munaza 11 - Oct - 2022 00 Min 07 Sec 20/20
L

Laiba Khan 24 - Jul - 2022 02 Min 18 Sec 16/20
S

Sania Abbas 25 - Jul - 2022 06 Min 13 Sec 16/20
T

tahreem fatima 12 - Nov - 2022 00 Min 04 Sec 15/20
F

Filza Ahsan 11 - Nov - 2022 01 Min 33 Sec 15/20
F

Faiz Barvi443 19 - Mar - 2023 03 Min 29 Sec 14/20
B

Basit Khan 09 - Aug - 2022 06 Min 44 Sec 14/20
A

Amat Nur 27 - Jun - 2023 07 Min 07 Sec 14/20
A

Abdullah 11 - Apr - 2023 10 Min 50 Sec 14/20
D

Dania 01 - Jan - 2023 14 Min 03 Sec 14/20
A

Ali Ahmed Tauqeer 03 - Mar - 2024 03 Min 27 Sec 13/20
A

Anaya 07 - Jul - 2023 04 Min 28 Sec 13/20
U

Urooj Wajid 15 - Sep - 2022 06 Min 47 Sec 13/20
M

Meer Sadeed 07 - Sep - 2023 10 Min 50 Sec 13/20
R

Rana Ubaid Chohan 16 - Jul - 2022 10 Min 50 Sec 13/20

MCAT Chemistry Chapter 21 Important MCQ's

Sr.#	Question	Answer
1	Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen	A. 2 days B. 5 days C. 6 days D. 7 days
2	Hydrosphere covers the surface of erath:	A. 70.8% B. 71.8% C. 72.8% D. 73.8%
3	How much quantity of water is in the domestic use	A. 0.08% B. 16% C. 24% D. 90%
4	Hydrocarbons, SO₂, CO, NH₃nitrogen oxides and compounds of fluorine are called	A. Primary pollutant B. Secondary pollutant C. Tertiary pollutant D. None of these
5	The respiration process taking place in animals depends on a difference in	A. Partial pressure B. Osomotic pressure C. Vapour pressure D. Atomospheric pressure
6	Detergent greatly effects the	A. Aquatic life B. Modern life C. Terrestrial life D. Plants life
7	A chemist says that glass must be a super cooled liquid. the reason that he might have in his mind is that glass has:	A. Definite shape B. Definite volume C. Crystalline structure D. No crystalline structure
8	Fungicides are the pesticides which:	A. Control the growth of fungus B. Kills insects C. Kills plants D. Kill herb
9	Newspapers can be recycled again and again by how many times	A. 5 B. 2 C. 4 D. 3
10	What is the morality of a solution containing 15g of urea is 500cm³ of solution?	A. 1M B. 0.5M C. 2M D. 1.5M

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MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

MCQ's Test For MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

Chlorination of water is effective for

The layer of earth around the earth is called:

Photo chemical smog contains ______ as main reactants

Which is used as a coagulant:

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

To purify water which has mud dissolved in it, a substance which coagulates the suspended particles is used.The coagulant may be

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

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

The smog having high contents of SO2is

Which of the following is not a secondary pollutant

Smaller unit of biosphere is:

Elevated concentration of ______________ is harmful for fish as it clog the gills causing suffocation

The destructive distillation of coal gives three products. which of following is not the product of destructive distillation of coal?

Splitting of spectral lines when atoms are subjected to strong electric field is called:

Materials suspended in water or present as colloidal form in raw water are removed by:

HOCl is a compound:

BOD means

Potable water is considered to be

A single chlorine free radical can destory how many ozone molecules

99.5% mass of lithosphere is made of

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Top Scorers Of MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test MCQ`s Test

MCAT Chemistry Chapter 21 Important MCQ's

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To purify water which has mud dissolved in it, a substance which coagulates the suspended particles is used.
The coagulant may be

The smog having high contents of SO₂is