JEE-MAIN SERIES Chemistry
Water Pollution
5 previous year questions.
Volume: 5 Ques
Yield: Medium
High-Yield Trend
1
2023 2
2022 1
2019 1
2016 Chapter Questions 5 MCQs
01
PYQ 2016
medium
chemistry ID: jee-main
The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be , , and , respectively. This water is unsuitable for drinking due to high concentration of :
1
Fluoride
2
Lead
3
Nitrate
4
Iron
02
PYQ 2019
medium
chemistry ID: jee-main
The concentration of dissolved oxygen in cold water can go upto :
1
10 ppm
2
14 ppm
3
16 ppm
4
8 ppm
03
PYQ 2022
medium
chemistry ID: jee-main
The eutrophication of water body results in:
1
loss of Biodiversity.
2
breakdown of organic matter.
3
increase in biodiversity.
4
decrease in BOD.
04
PYQ 2022
medium
chemistry ID: jee-main
Given below are two statements :
Statement I: In polluted water values of both dissolved oxygen and BOD are very low.
Statement II: Eutrophication results in decrease in the amount of dissolved oxygen.
In the light of the above statements, choose the most appropriate answer from the options given below :
Statement I: In polluted water values of both dissolved oxygen and BOD are very low.
Statement II: Eutrophication results in decrease in the amount of dissolved oxygen.
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 true.
2
Both Statement I and Statement II are false.
3
Statement I is true but Statement II is false.
4
Statement I is false but Statement II is true.
05
PYQ 2023
medium
chemistry ID: jee-main
The water quality of a pond was analysed and its BOD was found to be 4. The pond has
1
Water has high amount of fluoride compounds
2
Highly polluted water
3
Very clean water
4
Slightly polluted water