Sewage water can be purified by

(1) Aquatic plant

(2) Microorganism

(3) Penicillin

(4) Fishes

Subtopic:  Water Pollution - Water Pollution & Portable Water |
 85%
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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Major pollutant in Jet plane emission is -

(1) SO2

(2) CFC

(3) CO

(4) CCl4

Subtopic:  Air Pollution - Greenhouse Effect |
 60%
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B.O.D is-

1. The amount of O2 utilized by organisms in the water. 
2. The amount of O2 utilized by microorganisms for decomposition.
3. The total amount of O2  present in water.
4. All of the above

Subtopic:  Water Pollution - Biological Oxygen Demand |
 68%
From NCERT
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To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

What is the intensity of sound in normal conversation 

1. 10 -20 decibal

2. 30 - 60 decibal

3. 70 - 90 decibal

4. 120 - 150 decibal

Subtopic:  Introduction |
 60%
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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Which of the following is absent in polluted water

1. Hydrilla

2. Water hyacinth

3. Larva of stone fly

4. Blue green algae

Subtopic:  Water Pollution - Biological Oxygen Demand |
 53%
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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Maximum green house gas released by which country

(1) India

(2) China

(3) U.S.A

(4) Britain

Subtopic:  Air Pollution - Greenhouse Effect |
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The ozone layer of the upper atmosphere is being destroyed by : 

1. Sulphur dioxide

2. Carbon dioxide

3. Chlorofluorocarbon

4. Smog

Subtopic:  Air Pollution - Greenhouse Effect |
 93%
From NCERT
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Most hazardous metal pollutant of automobile exhaust is

(1) Hg

(2) Cd

(3) Pb

(4) Cu

Subtopic:  Air Pollution - Global Warming |
 73%
From NCERT
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

SO2 pollution is indicated by

1. Grasses

2. Mosses

3. Lichens

4. Fossils

Subtopic:  Air Pollution - Smog |
 88%
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B.O.D is connected with

(1) Organic matter

(2) Microbes

(3) Both

(4) None

Subtopic:  Water Pollution - Biological Oxygen Demand |
 76%
From NCERT
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh