This chapter is currently out of syllabus
1
JEE Main 2017 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Identify the pollutant gases largely responsible for the discoloured and lustreless nature of marble of the Taj Mahal.
A
O3 and CO2
B
CO2 and NO2
C
SO2 and NO2
D
SO2 and O3
2
JEE Main 2017 (Offline)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
A water sample has ppm level concentration of following anions
F- = 10; $$SO_4^{2-}$$ = 100; $$NO_3^-$$ = 50
The anion/anions that make/makes the water sample unsuitable for drinking is/are :
A
both $$SO_4^{2-}$$ and $$NO_3^-$$
B
only F-
C
only $$SO_4^{2-}$$
D
only $$NO_3^-$$
3
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Which one of the following substances used in dry cleaning is a better strategy to control environmental pollution?
A
Tetrachloroethylene
B
Carbon dioxide
C
Sulphur dioxide
D
Nitrogen dioxide
4
JEE Main 2016 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
BOD stands for :
A
Biological Oxygen Demand
B
Bacterial Oxidation Demand
C
Biochemical Oxygen Demand
D
Biochemical Oxidation Demand
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