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9th Punjab Board
IMPORTANT
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Name the technique to separate butter from curd.

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Important Questions on Is Matter Around Us Pure?

MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 2 - Is Matter Around Us Pure?>Questions>Q 2
Name the technique to separate salt from seawater.
MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 2 - Is Matter Around Us Pure?>Questions>Q 2
Name the technique to separate camphor from salt.
MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 2 - Is Matter Around Us Pure?>Questions>Q 3
What type of mixtures are separated by the technique of crystallisation?
MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 2 - Is Matter Around Us Pure?>Questions>Q 1
Classify the following as chemical or physical changes:
(a) cutting of trees,
(b) melting of butter in a pan,
(c) rusting of almirah,
(d) boiling of water to form steam,
(e) passing of electric current, through water and the water breaking down into hydrogen and oxygen gases,
(f) dissolving common salt in water,
(g) making a fruit salad with raw fruits, and
(h) burning of paper and wood.
MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 2 - Is Matter Around Us Pure?>Questions>Q 2
Try segregating the things around you as pure substances or mixtures.
MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 2 - Is Matter Around Us Pure?>Exercises>Q 1
Which separation technique will you apply for the separation of sodium chloride from its solution in water? (Evaporation/ Filtration/ Centrifugation)
MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 2 - Is Matter Around Us Pure?>Exercises>Q 1
Which separation technique will you apply for the separation of ammonium chloride from a mixture containing sodium chloride and ammonium chloride?
MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 2 - Is Matter Around Us Pure?>Exercises>Q 1
Which separation technique will you apply for the separation of small pieces of metal in the engine oil of a car? (Evaporation/ Filtration)