PYQSide ExamsMy practice

Environmental Issues · Question 2

NEET (UG) 2023MCQEasy📈 Topic in 12% papers+4−1
1

Which one of the following statements is NOT correct?

  1. Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries
  2. Water hyacinth grows abundantly in eutrophic water bodies and leads to an imbalance in the ecosystem dynamics of the water body
  3. The amount of some toxic substances of industrial waste water increases in the organisms at successive trophic levels
  4. The micro-organisms involved in biodegradation of organic matter in a sewage polluted water body consume a lot of oxygen causing the death of aquatic organisms

Answer

(1) Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries

Solution

Algal blooms cause deterioration of water quality and fish mortality (they deplete dissolved oxygen and some are toxic), so statement (1) is NOT correct.

(2) is correct: water hyacinth flourishes in eutrophic water bodies and upsets their ecosystem dynamics.

(3) is correct: this is biomagnification (e.g. mercury, DDT).

(4) is correct: high BOD of sewage-polluted water leads to oxygen depletion and death of fish and other aquatic organisms.

Answer: (1)

Out of syllabusNEET (UG) 2023

Keep practising — Environmental Issues

2

Which of the following statements is correct?

  1. Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.
  2. Presence of large amount of nutrients in water restricts ‘Algal Bloom’
  3. Algal Bloom decreases fish mortality
  4. Eutrophication refers to increase in domestic sewage and waste water in lakes.
Out of syllabusNEET (UG) 2023
3

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

  1. Both Statement I and Statement II are incorrect.
  2. Statement I is correct but Statement II is incorrect.
  3. Statement I is incorrect but Statement II is correct.
  4. Both Statement I and Statement II are correct.
Out of syllabusNEET (UG) 2023
4

The device which can remove particulate matter present in the exhaust from a thermal power plant is:

  1. STP
  2. Incinerator
  3. Electrostatic Precipitator
  4. Catalytic Converter
Out of syllabusNEET (UG) 2022
5

The entire fleet of buses in Delhi were converted to CNG from diesel. In reference to this, which one of the following statements is false?

  1. CNG burns more efficiently than diesel
  2. The same diesel engine is used in CNG buses making the cost of conversion low
  3. It is cheaper than diesel
  4. It cannot be adulterated like diesel
Out of syllabusNEET (UG) 2022
6

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
Out of syllabusNEET (UG) 2022
7

Why CNG is considered better fuel than diesel? Choose the most appropriate answer from the options given below :

  1. C, D and E only
  2. A, B, C and E only
  3. A, C and D only
  4. A, B, D and E only
Out of syllabusNEET (UG) 2022 (Phase 2)
8

Dobson units are used to measure thickness of :

  1. Troposphere
  2. CFCs
  3. Stratosphere
  4. Ozone
Out of syllabusNEET (UG) 2021
9

Snow-blindness in Antarctic region is due to

  1. High reflection of light from snow
  2. Freezing of fluids in the eye by low temperature
  3. Inflammation of cornea due to high dose of UV-B radiation
  4. Damage to retina caused by infra-red rays
Out of syllabusNEET (UG) 2020
10

Montreal protocol was signed in 1987 for control of

  1. Disposal of e-wastes
  2. Transport of Genetically modified organisms from one country to another
  3. Emission of ozone depleting substances
  4. Release of Green House gases
Out of syllabusNEET (UG) 2020
11

Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?

  1. Gothenburg Protocol
  2. Geneva Protocol
  3. Montreal Protocol
  4. Kyoto Protocol
Out of syllabusNEET (UG) 2019

All Environmental Issues PYQs →

PDFDownload Environmental Issues PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)