MEDIUM
9th CBSE
IMPORTANT
Earn 100

State the principle of centrifugation. Give its two applications.

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 23
Define distillation. What types of liquids (substance) can be separated by this process?
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 2 - Is Matter Around Us Pure?>CHAPTER EXERCISE>Q 24
What is the distillation process? What kind of mixture can be separated by distillation?
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.