General Science - Questions and Answers

1. Carbon, diamond and graphite are together called

2. Which of the following statements about dry ice are correct ? 1. It is a useful refrigerant. 2. On heating, it turns into a liquid. 3. It has acidic properties. 4. It causes burns when pressed against the skin.

3. Soap is a mixture of sodium or potassium salts of

4. Dendrology is associated with the study of

5. Life appeared about