JEE Main Environmental Chemistry Previous Year Questions With Solutions

JEE Main Environmental Chemistry: Let us look at the questions asked from Environmental Chemistry in JEE Main exam over the past few years.

1. Which is wrong with respect to our responsibility as a human being to protect our environment?

1. Avoiding the use of floodlighted facilities
2. Setting up compost tin in gardens
3. Using plastic bags
4. Restricting the use of vehicles

Solution: The correct option for the given question is (c).

2. BOD stands for

1. Biochemical Oxidation Demand
2. Biological Oxygen Demand
3. Biochemical Oxygen Demand
4. Bacterial Oxidation Demand.

Solution: The correct option for the given question is (c).

3. The layer of atmosphere between 10 km and 50 km above the sea level is called

1. thermosphere
2. mesosphere
3. stratosphere
4. troposphere.

Solution: The correct option for the given question is (c).

4. Addition of phosphate fertilizers to water bodies causes

1. enhanced growth of algae
2. increase in the amount of dissolved oxygen in the water
3. deposition of calcium phosphate
4. increase in the fish population.

Solution: The correct option for the given question is (a).

5. Water samples with BOD values of 4 ppm and 18 ppm, respectively, are

1. clean and highly polluted
2. highly polluted and highly polluted
3. highly polluted and clean
4. clean and clean.

Solution: The correct option for the given question is (a).

6. Excessive release of CO₂ into the atmosphere results in

1. global warming
2. formation of smog
3. polar vortex
4. depletion of ozone.

Solution: The correct option for the given question is (a).

7. The higher concentration of which gas in the air can cause stiffness of flower buds?

1. SO₂
2. CO
3. NO₂
4. CO₂

Solution: The correct option for the given question is (a).

8. Air pollution that occurs in sunlight is

1. oxidising smog
2. fog
3. reducing smog
4. acid rain.

Solution: The correct option for the given question is (a).

9. The gas leaked from a storage tank of the Union Carbide plant in the Bhopal gas tragedy was

1. phosgene
2. methylisocyanate
3. methylamine
4. ammonia.

Solution: The correct option for the given question is (b).

10. The maximum prescribed concentration of copper in drinking water is

1. 0.05 ppm
2. 3 ppm
3. 5 ppm
4. 0.5 ppm

Solution: The correct option for the given question is (b).

11. Taj Mahal is being slowly disfigured and discoloured. This is primarily due to

1. acid rain
2. soil pollution
3. water pollution
4. global warming

Solution: The correct option for the given question is (a).

12. The upper stratosphere consisting of the ozone layer protects us from the sun’s radiation that falls in the wavelength region of

1. 400-550 nm
2. 600-750 nm
3. 200-315 nm
4. 0.8-1.5 nm

Solution: The correct option for the given question is (c).

13. Identify the wrong statement in the following.

1. Acid rain is mostly because of the oxides of nitrogen and sulphur.
2. Chlorofluorocarbons are responsible for ozone layer depletion.
3. Greenhouse effect is responsible for global warming.
4. Ozone layer does not permit infrared radiation from the sun to reach the earth.

Solution: The correct option for the given question is (d).

14. Which one of the following substances used in dry cleaning is a better strategy to control environmental pollution?

1. Sulphur dioxide
2. Carbon dioxide
3. Nitrogen dioxide
4. Tetrachloroethylene

Solution: The correct option for the given question is (b).

15. The smog is essentially caused by the presence of

1. O₂ and O₃
2. O₂ and N₂
3. oxides of sulphur and nitrogen
4. O₃ and N₂.

Solution: The correct option for the given question is (c).

16. Which of the following conditions in drinking water causes methemoglobinemia?

1. > 50 ppm of chloride
2. > 50 ppm of nitrate
3. > 50 ppm of lead
4. > 100 ppm of sulphate

Solution: The correct option for the given question is (b).

Also read: JEE Main Exam Mode

FAQs

What is the weightage of Environmental Chemistry in the JEE principle assessment?

In the JEE mains assessment, an aggregate of somewhere around 2-3 inquiries are posed from the subject concerning Environmental Chemistry. These inquiries together convey an absolute weightage of 6.6 rates. As the wannabes are very much aware that every one of the inquiries in the assessments conveys equivalent significance as they help in expanding and supporting the positions and level of the up-and-comer. In this way, it is right to express that the subject concerning Environmental Chemistry likewise has equivalent significance as some other theme.

What is Environmental Chemistry?

Ecological Chemistry alludes to the compound and biochemical peculiarity in our temperament. As we know that the planet earth is the amassing of different moment substances and particles. These respond to frame new particles. In this way, it is reasoned that the planet earth is a shut framework, and all the energy that is applied comes and leaves the planet, where the mass frequently remains behind in the planet. This finishes up and demonstrates that every one of the components on this planet is reused consistently inside the climate.