Chemistry MCQs
Practice free Chemistry multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 1238 questions — no login required.
Question 766medium
Ferrous sulphate is used in water treatment as a/an
Question 767easy
Charcoal is used in water treatment as a/an
Question 768easy
Which of the following is a secondary pollutant ?
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Question 769medium
Ultraviolet radiation striking the earth is due to the depletion of
Question 770medium
Many people died in London in 1952 as result of air pollution producing
Question 771hard
Which one of the following contributes largely to the ‘green house effect’ ?
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Question 772medium
An important green-house gas other than methane being produced from the agricultural fields is
Question 773medium
The gas which is mainly responsible for the green house effect is:
Question 774hard
Chernobyl disaster is the result of pollution by