Differentiate between homogeneous and heterogeneous mixtures with examples.

Important Questions on Is Matter Around Us Pure?

HARD

9th CBSE

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS IX>Chapter 2 - Is Matter Around Us Pure?>Questions>Q 2

How are sol, solution and suspension different from each other?

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9th CBSE

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS IX>Chapter 2 - Is Matter Around Us Pure?>Questions>Q 3

To make a saturated solution,

36

g of sodium chloride is dissolved in

100

g of water at

293

K. Find its concentration at this temperature.

MEDIUM

9th CBSE

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS IX>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.

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9th CBSE

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS IX>Chapter 2 - Is Matter Around Us Pure?>Questions>Q 2

Try segregating the things around you as pure substances or mixtures.

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9th CBSE

IMPORTANT

SCIENCE TEXTBOOK FOR CLASS IX>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 CBSE