Table of Contents
Introduction
Biology, math, genetics, engineering, hydrology, toxicology, and other techniques are used in this discipline. The following questions will give you a sense of the types of questions you can expect from this topic. In comparison to other JEE chapters, this is a simple topic. This chapter provides students with an easy way to earn points. Infinity Learn offers precise solutions developed by our subject matter experts.
This article contains previous year’s Environmental Chemistry JEE Main questions and solutions. This article will assist students in revising past year’s questions in order to improve their JEE exam scores. These solutions are available in PDF format for students to download for free.
FAQs
Q: What goes wrong when it comes to our human obligation to protect the environment?
(a) Refraining from using floodlit facilities
(b) Installing compost tins in gardens
(c) The use of plastic bags
(d) Limiting the usage of automobiles
Ans: To safeguard the environment, plastic bags should be avoided.
As a result, option (c) is the correct answer.
Q: BOD stands for
(a) Demand for Biochemical Oxidation
(b) Biological Oxygen Demand
(c) Demand for Biochemical Oxygen
(d)Demand for Bacterial Oxidation.
Ans: Biochemical Oxygen Demand (BOD) is an acronym for Biochemical Oxygen Demand.
As a result, option (c) is the correct answer.
Q: The atmosphere between 10 and 50 kilometres above sea level is known as the stratosphere.
(a) Thermosphere
(b) Mesosphere
(c) Stratosphere
(d) Troposphere
Ans: The stratosphere is a layer of the atmosphere that exists between 10 and 50 kilometres above sea level.
As a result, option (c) is the correct answer.
Q: Phosphate fertilizers to water body cause
(a) increased algal growth
(b) an increase in the amount of oxygen dissolved in the water
(c) Calcium Phosphate Deposition
(d) An increase in the number of fish
Ans: Algae development is accelerated when phosphate fertilizers are added to water bodies.
As a result, option (a) is the correct answer.
Q: Water samples with BOD values of 4 and 18 ppm are analyzed.
(a) both clean and filthy
(b) extremely polluted and extremely polluted
(c) both polluted and unpolluted
(d) keep it clean.
Ans 5: The BOD value of clean water is less than 5 ppm. Water with a BOD value of 17 ppm or more is considered highly contaminated.
As a result, option (a) is the correct answer.
Q: An excessive amount of CO2 is released into the atmosphere, resulting in
(a) Climate change
(b)Smog formation
(c) polar vortex
(d) ozone depletion.
Ans: Global warming is caused by the excessive release of CO2 into the atmosphere.
As a result, option (a) is the correct answer.
Q: Which gas, when present in larger concentrations in the air, can cause flower buds to stiffen?
(a)SO2
(b)CO2
(c) Nitrogen dioxide
(d)CO2
Ans: The increased concentration of SO2 in the air might cause flower buds to stiffen.
As a result, option (a) is the correct answer.
Q: Sunlight pollution is a type of air pollution that happens when the sun shines on the ground.
(a) smog oxidation
(b) the fog
(c) lowering smog level
(d) Acid rain is a type of precipitation that is acidic in nature.
Ans: The major components of photochemical smog are unsaturated hydrocarbons and nitrogen oxides produced by factories and automobiles, which are exposed to sunlight. There is a lot of oxidizing agent in a photochemical haze. As a result, it is known as an oxidising agent. As a result, option (a) is the correct answer.
Q: In the Bhopal gas catastrophe, gas spilt from a storage tank at the Union Carbide facility.
(a)phosgene
(b)methylisocyanate
(c)methylamine
(d)ammonia
Ans:The gas disaster in Bhopal was caused by methylisocyanate.
As a result, option (b) is the correct answer.
Q: The maximum copper concentration allowed in drinking water is 10 mg/L.
(a) 0.05 parts per million
(b) 3 parts per million
(c) 5 parts per million
(d) 0.5 parts per million
Ans:Copper concentrations in drinking water must not exceed 3 parts per million (ppm).
As a result, option (b) is the correct answer.
Q: The Taj Mahal is gradually disfiguring and discolouring. This is due to a variety of factors.
(a)acid rain
(b) contamination of the soil
(c) contamination of water
(d) Climate change
Ans:The discolouration of the Taj Mahal is due to acid rain.
As a result, option (a) is the correct answer.
Q: The ozone layer in the high stratosphere protects humans from the sun’s energy that falls in the wavelength range of
(a) 400-550 nm
(b) wavelengths of 600-750 nm
(c) wavelengths of 200-315 nm
(d) 0.8-1.5 nm
Ans: Ozone shields humans from the sun’s energy with wavelengths ranging from 200 to 315 nm.
As a result, option (c) is the correct answer.
Q: Recognize which of the following is incorrect
(a) The main source of acid rain is nitrogen and sulfur oxides.
(b) Ozone layer depletion is caused by chlorofluorocarbons.
(c) Global warming is caused by the greenhouse effect.
(d) The ozone layer prevents the sun’s infrared radiation from reaching the earth.
Ans: The ozone planet is a thick layer of ozone that effectively absorbs the sun’s harmful UV radiation. It serves as a protective barrier. It prevents the sun’s UV rays from reaching the earth.
As a result, option (d) is the correct answer.
Q: Which of the following dry-cleaning ingredients is a superior method for reducing environmental pollution?
(a)Sulfur dioxide
(B)Carbon dioxide
(c) Nitrogen dioxide is a gas that is produced by the decomposition of
(d)Tetrachloroethylene
Ans:Liquid carbon dioxide is a preferable substitute for halogenated solvents (potentially carcinogenic). As a result, option (b) is the correct answer.
Q: The existence of smog is mostly caused by the presence of
(a) Oxygen (O2) and oxygen (O3)
(b) Oxygen and nitrogen
(c) Sulphur and nitrogen oxides
(d)O3 and N2 are the third and fourth elements, respectively.
Ans:Smog is caused by Sulphur and nitrogen oxides.
As a result, option (c) is the correct answer.
