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1
JEE Main 2023 (Online) 1st February Evening Shift
MCQ (Single Correct Answer)
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The industrial activity held least responsible for global warming is :

A
manufacturing of cement
B
Electricity generation in thermal power plants
C
steel manufacturing
D
Industrial production of urea
2
JEE Main 2023 (Online) 1st February Morning Shift
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How can photochemical smog be controlled?

A
By using catalytic convertors in the automobiles/industry.
B
By complete combustion of fuel.
C
By using tall chimneys.
D
By using catalyst.
3
JEE Main 2023 (Online) 31st January Morning Shift
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Identify X, Y and Z in the following reaction. (Equation not balanced)

JEE Main 2023 (Online) 31st January Morning Shift Chemistry - Environmental Chemistry Question 19 English

A
$$\mathrm{X}=\mathrm{ClONO}_{2}, \mathrm{Y}=\mathrm{HOCl}, \mathrm{Z}=\mathrm{NO}_{2}$$
B
$$\mathrm{X}=\mathrm{ClNO}_{3}, \mathrm{Y}=\mathrm{Cl}_{2}, \mathrm{Z}=\mathrm{NO}_{2}$$
C
$$\mathrm{X}=\mathrm{ClONO}_{2}, \mathrm{Y}=\mathrm{HOCl}, \mathrm{Z}=\mathrm{HNO}_{3}$$
D
$$\mathrm{X}=\mathrm{ClNO}_{2}, \mathrm{Y}=\mathrm{HCl}, \mathrm{Z}=\mathrm{HNO}_{3}$$
4
JEE Main 2023 (Online) 30th January Evening Shift
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The water quality of a pond was analyzed and its BOD was found to be 4. The pond has :
A
Very clean water
B
Highly polluted water
C
Water has high amount of fluoride compounds
D
Slightly polluted water
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