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1
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
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-1
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Which is wrong with respect to our responsiblity as a human being to protect our environment?
A
Restricting the use of vehicles
B
Setting up compost tin in gardens.
C
Avoiding the use of floodlighted facilities
D
Using plastic bags.
2
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
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The compound that is NOT a common component of photochemical smog is :
A
O3
B
JEE Main 2019 (Online) 12th January Evening Slot Chemistry - Environmental Chemistry Question 76 English Option 2
C
CH2 = CHCHO
D
CF2Cl2
3
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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The molecule that has minimum /no role in the formation of photochemical smog, is :
A
CH2 = O
B
O3
C
N2
D
NO
4
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
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Water samples with BOD values of 4 ppm and 18 ppm, respectively are :
A
Clean and Highly polluted
B
Highly polluted and Clean
C
Highly polluted and Highly polluted
D
Clean and Clean
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