Two elements which can form a large number of compounds are
1). Carbon and Hydrogen
2). Carbon and Nitrogen
3). Carbon and Oxygen
4). Carbon and Sulphur
1. Which is not a green house gas ?
2. Which of the following is not soluble in water?
4. At room temperature, the metal that remains liquid is:
5. Acid rain is caused by the?pollution of environment by-
6. The major constituent of gobar gas is
7. Which of the following is used as a preservative to protect processed food?
8. An example of replenishable energy source is–
9. Dry ice is
10. Which of the following elements has the lowest melting point?