MEDIUM
9th CBSE
IMPORTANT
Earn 100

Explain why milk is regarded as a mixture and not as a pure substance.

Important Questions on Test Paper 2

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 7 - Test Paper 2>Test Paper 2>Q 4
How would you confirm that a colourless liquid given to you is pure water?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 7 - Test Paper 2>Test Paper 2>Q 1
Why does the smell of hot sizzling food reach you several metres away, but to get the smell from cold food you have to go close?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 7 - Test Paper 2>Test Paper 2>Q 2
In the absence of a refrigerator, butter is kept wrapped in a wet cloth during summer. Why?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 7 - Test Paper 2>Test Paper 2>Q 3
State the types of mixture. Give examples for each type.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 7 - Test Paper 2>Test Paper 2>Q 4

Give one example of each of the following:
a) a solution of a gas in liquid.
b) a solution of two gases.
c) a solution of two liquids.
d) a solution of two solids.

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 7 - Test Paper 2>Test Paper 2>Q 5
How will you differentiate between a suspension and a colloid? Give one example of each.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 7 - Test Paper 2>Test Paper 2>Q 6

Name the technique to separate             

a. butter from curd                

b. salt from sea water                 

c. camphor from salt.

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 7 - Test Paper 2>Test Paper 2>Q 1
While determining the boiling point of water in the laboratory, the beaker containing hot water accidentally fell on the hand of a student. A fellow student immediately put cold water on his hand and then placed ice cubes on his hand. He then took the student to the school dispensary for giving him first aid.
a. Define boiling point.
b. Why does temperature remain constant during boiling?
c. How does boiling differ from evaporation?
d. State the values displayed by the fellow student.