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8th ICSE
IMPORTANT
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Centrifugation process is used for separating cream from the milk.

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Important Questions on Elements, Compounds and Mixtures

EASY
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>EXERCISES>Q 10
Ammonium chloride sublimes on heating.
EASY
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>EXERCISES>Q 1
What are pure substances? Give two examples of pure substances.
MEDIUM
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>EXERCISES>Q 2
Which of the following are ‘pure substances’?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
EASY
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>EXERCISES>Q 6
State three reasons why you think air is a mixture and water is a compound.
MEDIUM
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>EXERCISES>Q 7
What is the difference between threshing and winnowing?
EASY
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>EXERCISES>Q 8
Which one of the two methods- sieving or winnowing, is better for the separation of bran from wheat flour?
EASY
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>EXERCISES>Q 10
How do you separate a mixture of salt and ammonium chloride?
HARD
8th ICSE
IMPORTANT
Lakhmir Singh's Science - Chemistry>Chapter 3 - Elements, Compounds and Mixtures>EXERCISES>Q 12
What is the difference between simple distillation and fractional distillation?