Consider the following:
1. Oxides of Hydrogen
2. Oxides of Nitrogen
3. Oxides of Sulphur
Which of the above causes/cause acid rain?

The function of heavy water in a nuclear reactor is to

Which of the following materials is used along with iron ore and limestone to produce iron in a modern blast furnace?

Nitrous oxide, commonly called laughing gas, has been a matter of concern to environmentalists recently because:

The radioactive element most commonly detected in humans is

Radioisotopes which are used in medical diagnosis are known as

Most commercial nuclear power plants worldwide are cooled by

Which of the following elements was unknown to ancient civilizations?

Steel is composed of a number of elements. The two essential elements are iron and

Which of the following is not a major pollutant from automobiles?