MEDIUM
9th CBSE
IMPORTANT
Earn 100
How will you separate a mixture containing kerosene and petrol, both of which are miscible with each other?
Important Questions on Is Matter Around Us Pure?
EASY
9th CBSE
IMPORTANT
What do you understand by physical change and chemical change? Classify the following as physical or chemical changes:
(i) Dissolving salt in water
(ii) Electric current is passed through water and it is broken down into hydrogen and oxygen
(iii) Evaporation of alcohol
(iv) Digestion of food
MEDIUM
9th CBSE
IMPORTANT
Define element, compound and mixture. Give two examples of each.
MEDIUM
9th CBSE
IMPORTANT
Give five differences between compounds and mixtures.
HARD
9th CBSE
IMPORTANT
Classify the following into element, compound and mixture:
(I) coal (ii) methane (iii) copper (iv) carbon dioxide (v) steam (vi) honey (vii) granite (viii) blood (ix) sugar (x) germanium
HARD
9th CBSE
IMPORTANT
Define the terms; solution, suspension and colloid. Make a comparison of size of their particles.
MEDIUM
9th CBSE
IMPORTANT
Write the steps you would use for making tea. Use the words: Solution, solvent, solute, dissolve, soluble, insoluble, filtration and residue.
EASY
9th CBSE
IMPORTANT
Explain saturated solution giving examples.
EASY
9th CBSE
IMPORTANT
Explain colloid giving examples.
