MEDIUM
9th CBSE
IMPORTANT
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What is the distillation process? What kind of mixture can be separated by distillation?

Important Questions on Is Matter Around Us Pure?

MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 2 - Is Matter Around Us Pure?>CHAPTER EXERCISE>Q 25
The boiling points of two liquids A and B are 61°Cand 111° C respectively. How will you separate this mixture?
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 2 - Is Matter Around Us Pure?>CHAPTER EXERCISE>Q 26
Differentiate between physical and chemical change.
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 2 - Is Matter Around Us Pure?>CHAPTER EXERCISE>Q 26
'All mixtures are homogeneous', comment upon this statement.
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 2 - Is Matter Around Us Pure?>CHAPTER EXERCISE>Q 27
The melting of wax is a physical change, but the burning of wax is a chemical change. Explain.
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 2 - Is Matter Around Us Pure?>CHAPTER EXERCISE>Q 28
A solution contains 16 g of urea in 120 g of the solution. What is mass by the mass percentage of a solution?
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 2 - Is Matter Around Us Pure?>CHAPTER EXERCISE>Q 29
A solution of alcohol in water has been prepared by mixing 150 mL of alcohol with 600 mL of water. Calculate the volume percentage of the solution.
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 2 - Is Matter Around Us Pure?>CHAPTER EXERCISE>Q 30
A solution contains 50 mL of alcohol mixed with 150 mL of water. Calculate the concentration of this solution.
HARD
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 2 - Is Matter Around Us Pure?>CHAPTER EXERCISE>Q 31
The solubility of potassium nitrate at 20°C is 32 g per 100 g of water. How much salt is required to prepare 66 g of its saturated solution?