Science Quiz

1 Which of the following is used in pencils?

• 1 Graphite

• 2 Silicon

• 3 Charcoal

• 4 Phosphorous

2 The gas usually filled in the electric bulb is

• 1 nitrogen

• 2 hydrogen

• 3 carbon dioxide

• 4 oxygen

3 Which of the gas is not known as green house gas?

• 1 Methane

• 2 Nitrous oxide

• 3 Carbon dioxide

• 4 Hydrogen

4 The hardest substance available on earth is

• 1 Gold

• 2 Iron

• 3 Diamond

• 4 Platinum

5 Non stick cooking utensils are coated with

• 1 Teflon

• 2 PVC

• 3 black paint

• 4 polystyrene

6 Potassium nitrate is used in

• 1 medicine

• 2 fertiliser

• 3 salt

• 4 glass

7 Most soluble in water is

• 1 camphor

• 2 sulphur

• 3 common salt

• 4 sugar

8 What is laughing gas?

• 1 Nitrous Oxide

• 2 Carbon monoxide

• 3 Sulphur dioxide

• 4 Hydrogen peroxide

9 The two elements that are frequently used for making transistors are

• 1 boron and aluminium

• 2 silicon and germanium

• 3 iridium and tungsten

• 4 niobium and columbium

10 Permanent hardness of water can be removed by adding

• 1 chlorine

• 2 washing soda

• 3 potassium

• 4 bleaching powder