HARD
8th CBSE
IMPORTANT
Earn 100
Write equations for the following reactions :
(a) Aluminium and dilute hydrochloric.
b) Zinc and sodium hydroxide solution
(c) Sulphur and concentrated nitric acid
(d) Sulphur dioxide gas and water
(e) Heated iron and steam.
Important Questions on Materials : Metals and Non-Metals
MEDIUM
8th CBSE
IMPORTANT
Why are sodium and potassium stored under kerosene oil?
MEDIUM
8th CBSE
IMPORTANT
Why can copper not displace iron from iron sulphate solution?
HARD
8th CBSE
IMPORTANT
Why is the coil of the heating element of a heater made from metal?
HARD
8th CBSE
IMPORTANT
Why are aluminium foils used for packaging?
MEDIUM
8th CBSE
IMPORTANT
Why are pickles not stored in an aluminium can?
HARD
8th CBSE
IMPORTANT
Iron nails are placed in copper sulphate solution for two hours. State your observations and write a word equation in support of your answer?
HARD
8th CBSE
IMPORTANT
A boy introduced a red hot charcoal into a gas jar and covered it with a glass lid so as to collect the gas evolved. Explain:
(a) How will he find the nature of the gas?
(b) Write a word equation in support of your answer?
HARD
8th CBSE
IMPORTANT
A boy introduced red-hot charcoal into a gas jar and covered it with a glass lid to collect the gas evolved. Explain:
Write a word equation in support of your answer?
