EASY
9th CBSE
IMPORTANT
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Which separation technique is used for the separation of sodium chloride from its solution in water? (Evaporation/ Filtration)

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Important Questions on Is Matter Around Us Pure?

HARD
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 2 - Is Matter Around Us Pure?>TEST YOURSELF>Q 10
What is meant by crystallization? How is copper sulphate purified from its impure sample by crystallization method? Explain the procedure. 
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 2 - Is Matter Around Us Pure?>TEST YOURSELF>Q 11
Distinguish between homogeneous and heterogeneous mixtures. Classify the following as homogeneous and heterogeneous mixtures:
(i) Smoke
(ii) Tincture of iodine
(iii) Brass
(iv) Sugar solution
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 2 - Is Matter Around Us Pure?>TEST YOURSELF>Q 12
What are colloids? Give two examples.
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 2 - Is Matter Around Us Pure?>TEST YOURSELF>Q 12
Why do colloids show Tyndall effect?
MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 2 - Is Matter Around Us Pure?>TEST YOURSELF>Q 12
Compare the following properties of a true solution, colloid, and suspension.
(i) Stability
(ii) Size of particles
(iii) Filterability 
 
MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 2 - Is Matter Around Us Pure?>TEST YOURSELF>Q 13
The correct sequence of steps for separating a mixture of sand, ammonium chloride and sodium chloride is:
MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 2 - Is Matter Around Us Pure?>TEST YOURSELF>Q 14
The technique used to separate a mixture of ammonium chloride and sand is
 
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 2 - Is Matter Around Us Pure?>TEST YOURSELF>Q 15
A black mass of iron sulphide is crushed into powdered form and taken on a watch glass. When a magnet is brought near the powdered black mass of iron sulphide, then: