Carbon monoxide is an inflammable gas. Which one of the following is also inflammable?
1). Helium
2). Nitrogen
3). Oxygen
4). Hydrogen
Answer: 4). Hydrogen
Hydrogen can burn when mixed with an oxident and a source of ignition.
2. Which of the following is an ore of iron?
3. The poisonous gas accidentally released in Bhopal Gas Tragedy is
4. The material known in commerce as Terylene is a
5. Which of the following substance is highly plastic
6. The metal that is usually extracted from sea water is
7. Ozone hole is caused by chemicals like _____.