A hard coal containing little volatile matter is called ______.
1). Loess
2). Anthracite
3). Atoll
4). Lava
1. Which of the following is riot a greenhouse gas ?
3. Impure camphor is purified by
4. The common name of sodium tetraborate decahydrate is _____.
5. The chemical used in embalming biological materials is
6. Which of the following is a renewable source of energy ?
7. Burning pyrites ore gives out
8. Identify the metal which is nontoxic in nature