Which of the following acid is most abundant in acid rain?

Which of the following causes less pollution?

The pollutant released in Bhopal gas tragedy was

What should be the tolerable limit of fluoride ions in drinking water? What happens if it is higher than 10 ppm?

Why does water covered with excessive algae growth become polluted?

What are viable and non-viable particulates?

Ozone is a gas heavier than air. Why does ozone not settle down near the earth?

From where does ozone come in the photochemical smog?

What could be the harmful effects of improper management of industrial and domestic solid waste in a city?

Name the acids which are responsible for acid rain?

Give one example of organic herbicide.

In our cities we face endless hours of power cut. How recycled waste can be useful in getting rid of this problem?

(i) What do you mean by diffusion?
(ii) Ammonia and hydrochloric acid gases are prepared at the two extreme corners in the laboratory. Which gas will reach first to a person in the centre of the laboratory?
(iii) Write down the value points

What are pesticides and herbicides? Explain giving examples.

What do you mean by ozone hole? What are its consequences?

On the basis of chemical reactions involved, explain how do chlorofluorocarbons cause thinning of the ozone layer in the stratosphere?

Explain the tropospheric pollution in 100 words?

How carbon monoxide acts as a poison for human beings?

(a) Define eutrophication and pneumoconiosis.
(b) Write difference between photochemical and classical smog.

Have you ever observed any water pollution in your area? What measures would you suggest to control it?