1
JEE Main 2016 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
BOD stands for :
A
Biological Oxygen Demand
B
Bacterial Oxidation Demand
C
Biochemical Oxygen Demand
D
Biochemical Oxidation Demand
2
JEE Main 2016 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of :
A
Lead
B
Nitrate
C
Iron
D
Fluoride
3
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
Identify the wrong statements in the following:
A
Chlorofluorocarbons are responsible for ozone layer depletion
B
Greenhouse effect is responsible for global warming
C
Ozone layer does not permit infrared radiation from the sun to reach the earth
D
Acid rains is mostly because of oxides of nitrogen and sulphur
4
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
The smog is essentially caused by the presence of
A
O2 and O3c
B
O3 and N2
C
Oxides of sulphur and nitrogen
D
O2 and N2
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