NEET Environmental Issues PYQ practice sheet

9 previous-year NEET Botany questions from Environmental Issues, newest papers first. Environmental Issues carries 8 of the Botany questions in NEET 2020 to 2026, so this is a good place to test yourself after revising the chapter. Marking: +4 correct, −1 wrong.

1. 1.

   NEET 2023

   The thickness of ozone in a column of air in the atmosphere is measured in terms of :

   • (A)
     Kilobase
   • (B)
     Dobson units
   • (C)
     Decibels
   • (D)
     Decameter
2. 2.

   NEET 2023

   Which one of the following statements is NOT correct?

   • (A)
     The amount of some toxic substances of industrial waste water increases in the organisms at successive trophic levels.
   • (B)
     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.
   • (C)
     Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries.
   • (D)
     Water hyacinth grows abundantly in eutrophic water bodies and leads to an imbalance in the ecosystem dynamics of the water body.
3. 3.

   NEET 2023

   Which of the following statements is correct?

   • (A)
     Algal Bloom decreases fish mortality
   • (B)
     Eutrophication refers to increase in domestic sewage and waste water in lakes.
   • (C)
     Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.
   • (D)
     Presence of large amount of nutrients in water restricts 'Algal Bloom'
4. 4.

   NEET 2023

   Given below are two statements: Statement I: Electrostatic precipitator is most widely used in thermal power plant. Statement II: Electrostatic precipitator in thermal power plant removes ionising radiations In the light of the above statements, choose the most appropriate answer from the options given below:

   • (A)
     Statement I incorrect but Statement II is correct.
   • (B)
     Both Statement I and Statement II are correct.
   • (C)
     Both Statement I and Statement II are incorrect.
   • (D)
     Statement I is correct but Statement II is incorrect.
5. 5.

   NEET 2022

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

   • (A)
     Catalytic Convertor
   • (B)
     STP
   • (C)
     Incinerator
   • (D)
     Electrostatic Precipitator
6. 6.

   NEET 2022

   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?

   • (A)
     It can not be adulterated like diesel
   • (B)
     CNG burns more efficiently than diesel
   • (C)
     The same diesel engine is used in CNG buses making the cost of conversion low
   • (D)
     It is cheaper than diesel
7. 7.

   NEET 2021

   Dobson units are used to measure thickness of :

   • (A)
     Stratosphere
   • (B)
     Ozone
   • (C)
     Troposphere
   • (D)
     CFCs
8. 8.

   NEET 2020

   Snow-blindness in Antarctic region is due to :

   • (A)
     Freezing of fluids in the eye by low temperature
   • (B)
     Inflammation of cornea due to high dose of UV-B radiation
   • (C)
     High reflection of light from snow
   • (D)
     Damage to retina caused by infra-red rays
9. 9.

   NEET 2020

   Montreal protocol was signed in 1987 for control of :

   • (A)
     Transport of Genetically modified organisms from one country to another
   • (B)
     Emission of ozone depleting substances
   • (C)
     Release of Green House gases
   • (D)
     Disposal of e-wastes