MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
Earn 100
Give reasons for the following: Aluminium foils are used to wrap food items.
Important Questions on Materials : Metals and Non-Metals
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
Give reasons for the following: Immersion rods for heating liquids are made up of metallic substances.
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
Give reasons for the following: Copper cannot displace zinc from its salt solution.
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
Give reasons for the following. Sodium and potassium are stored in kerosene.
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
Match the substances gives in Column A with their uses given in column B.
| A | B |
| i. Gold | a. Thermometers |
| ii. Iron | b. Electric wires |
| iii. Aluminium | c. Wrapping foods |
| iv. Carbon | d. Jewellery |
| v. Copper | e. Machinery |
| vi. Mercury | f. Fuel |
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
MEDIUM
8th Jammu and Kashmir Board
IMPORTANT
What happens when iron nails are placed in copper sulphate solution? Write word equations of the reaction involved.
HARD
8th Jammu and Kashmir Board
IMPORTANT
(a) How will she find the nature of the gas?
(b) Write down word equations of all the reactions taking place in this process.
