JEE Main 2016 (Online) 10th April Morning Slot | Environmental Chemistry Question 73 | Chemistry

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JEE Main 2016 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

-1

Which one of the following substances used in dry cleaning is a better strategy to control environmental pollution ?

Tetrachloroethylene

Carbon dioxide

Sulphur dioxide

Nitrogen dioxide

JEE Main 2016 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

BOD stands for :

Biological Oxygen Demand

Bacterial Oxidation Demand

Biochemical Oxygen Demand

Biochemical Oxidation Demand

JEE Main 2016 (Offline)

MCQ (Single Correct Answer)

-1

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 :

Lead

Nitrate

Iron

Fluoride

AIEEE 2008

MCQ (Single Correct Answer)

-1

Identify the wrong statements in the following:

Chlorofluorocarbons are responsible for ozone layer depletion

Greenhouse effect is responsible for global warming

Ozone layer does not permit infrared radiation from the sun to reach the earth

Acid rains is mostly because of oxides of nitrogen and sulphur

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