GK-General Science Question and Answer
GK-General Science Question and Answer
1. Brass gets discoloured in air because of the presence of which of the following gases in air?
- Oxygen
- Hydrogen sulphide
- Carbon dioxide
- Nitrogen
2. Which of the following is a non metal that remains liquid at room temperature?
- Phosphorous
- Bromine
- Chlorine
- Helium
4. Which of the following metals forms an amalgam with other metals?
- Tin
- Mercury
- Lead
- Zinc
5. The gas usually filled in the electric bulb is
- nitrogen
- hydrogen
- carbon dioxide
- oxygen
6. Washing soda is the common name for
- Sodium carbonate
- Calcium bicarbonate
- Sodium bicarbonate
- Calcium carbonate
7. Quartz crystals normally used in quartz clocks etc. is chemically
- silicon dioxide
- germanium oxide
- a mixture of germanium oxide and silicon dioxide
- sodium silicate
8. Which of the gas is not known as green house gas?
- Methane
- Nitrous oxide
- Carbon dioxide
- Hydrogen