Air, water, soil pollution; greenhouse effect; ozone depletion.
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Q1 · Environmental Chemistry · EASY
Which of the following gases is primarily responsible for the greenhouse effect on Earth?
Q2 · Environmental Chemistry · MEDIUM
Biochemical Oxygen Demand (BOD) is a measure used to assess water pollution. What does a high BOD value indicate about a water sample?
Q3 · Environmental Chemistry · EASY
The depletion of the ozone layer in the stratosphere is mainly caused by which class of compounds?
Q4 · Environmental Chemistry · MEDIUM
Acid rain is formed when certain pollutants react with atmospheric water. If the pH of normal rainwater is approximately 5.6 due to dissolved CO₂, what would be the approximate pH of acid rain?
Q5 · Environmental Chemistry · HARD
In a water sample, the presence of which ion is typically determined using the brown ring test, and what does its presence indicate about water quality?