The thickness of ozone in a column of air in the atmosphere is measured in terms of :
1.Kilobase 2.Dobson unit 
3.Decibels 4.Decameter
Subtopic:  Ozone Layer Depletion |
 81%
From NCERT
NEET - 2023
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Which one of the following statements is NOT correct?
 
1. The amount of some toxic substances of industrial wastewater increases in the organisms at successive trophic levels. 
2. The micro-organisms involved in biodegradation of organic matter in a sewage-polluted water body consume aquatic organisms.
3. Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries.
4. Water hyacinth grows abundantly in eutrophic water bodies and lead to an imbalance in the ecosystem dynamics of the water body.
Subtopic:  Water Pollution |
 65%
From NCERT
NEET - 2023
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Given below are two statements:

I: Electrostatic precipitator is most widely used in thermal power plant.
II: Electrostatic precipitator in thermal power plant removes ionising radiations

1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.

Subtopic:  Air Pollution |
From NCERT
NEET - 2023
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Which of the following statements is correct?
 
1. Algal Bloom decreases fish mortality.
2. Eutrophication refers to increase in domestic sewage and waste water in lakes.
3. Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.
4. Presence of large amounts of nutrients in water restricts 'Algal Bloom'.
Subtopic:  Water Pollution |
 63%
From NCERT
NEET - 2023
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Nitrates and phosphates flowing from agricultural farms into water bodies are a significant cause of:
1.Eutrophication2.Humification
3.Mineralisation4.Stratification
Subtopic:  Water Pollution |
 74%
From NCERT
NEET - 2023
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What will happen if fresh water lake gets contaminated by the addition of polluted water with high BOD?
1. Amount of dissolved oxygen in the lake will decrease.
2. The lake will remain unaffected
3. Number of submerged aquatic plants in the lake will increase
4. Number of aquatic animals in the lake will increase.
Subtopic:  Water Pollution |
 83%
From NCERT
NEET - 2023
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Match List - I with List - II
List-I List-II
(A) Deforestation (I) Responsible for heating of Earth's surface and atmosphere
(B) Reforesation (II) Conversion of forested areas to non-forested areas
(C) Green-house effect (III) Natural ageing of lake by nutrient enrichment of its water
(D) Eutrophication (IV) Process of restoring a forest that once existed but was removed
Choose the correct answer from the options given below:
Options: (A) (B) (C) (D)
1. IV III II I
2. I II III IV
3. III I II IV
4. II IV I III
Subtopic:  Green House Effect & Global Warming | Resource Utilisation & Maintenance | Water Pollution |
 84%
From NCERT
NEET - 2023
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Select the correct statements regarding dissolved Oxygen and Biochemical Oxygen demand.
A: BOD is inversely related to dissolved oxygen
B: Low dissolved oxygen and high BOD lead to loss of aquatic life.
C: High BOD leads to high dissolved oxygen
D: Both BOD and dissolved oxygen are indicator of health of a water body
E: Both BOD and dissolved oxygen are affected by amount of organic matter in the water body.
Choose the most appropriate answer from the options given below:
1. (A), (B), (C), (E) only 2. (A), (B), (D), (E) only
3. (A), (B), (C), (D) only 4. (B), (C), (D), (E) only
Subtopic:  Water Pollution |
 75%
From NCERT
NEET - 2023
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The device which can remove particulate matter present in the exhaust from a thermal power plant is : 
1. Catalytic Convertor
2. STP
3. Incinerator
4. Electrostatic Precipitator

Subtopic:  Air Pollution |
 82%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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The entire fleet of buses in Delhi was converted to CNG from diesel. In reference to this, which one of the following statements is false?

1. It cannot be adulterated like diesel.
2. CNG burns more efficiently than diesel.
3. The same diesel engine is used in CNG buses making the cost of conversion low.
4. It is cheaper than diesel.



 

Subtopic:  Air Pollution |
 73%
From NCERT
NEET - 2022
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