MEDIUM
9th CBSE
IMPORTANT
Earn 100

The 'sea-water' can be classified as a homogeneous as well as heterogeneous mixture. Comment.

Important Questions on Is Matter Around Us Pure?

MEDIUM
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 2 - Is Matter Around Us Pure?>Short Answer Questions>Q 14
While diluting a solution of salt in water, a student by mistake added acetone (boiling point 56°C). What technique can be employed to get back the acetone? Justify your choice.
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 2 - Is Matter Around Us Pure?>Short Answer Questions>Q 15
What would you observe when a saturated solution of potassium chloride prepared at 60°C is allowed to cool to room temperature?
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9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 2 - Is Matter Around Us Pure?>Short Answer Questions>Q 15
What would you observe when an aqueous sugar solution is heated to dryness.
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9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 2 - Is Matter Around Us Pure?>Short Answer Questions>Q 15
What would you observe when a mixture of iron filings and sulphur powder is heated strongly?
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9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 2 - Is Matter Around Us Pure?>Short Answer Questions>Q 16
Explain why particles of a colloidal solution do not settle down when left undisturbed, while in the case of suspension they do.
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9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 2 - Is Matter Around Us Pure?>Short Answer Questions>Q 17
Smoke and fog both are aerosols. In what way are they different?
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 2 - Is Matter Around Us Pure?>Short Answer Questions>Q 18
Classify the following as Physical property or Chemical property.
The composition of a sample of steel is 98%iron, 1.5% carbon and 0.5% other elements.
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 2 - Is Matter Around Us Pure?>Short Answer Questions>Q 18
Classify the following as Physical property or Chemical property.
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.