EASY
9th CBSE
IMPORTANT
Earn 100

Define freezing point.

Important Questions on Matter in Our Surroundings

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 1 - Matter in Our Surroundings>Exercise>Q 11

Define boiling point.

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 1 - Matter in Our Surroundings>Exercise>Q 12

What is condensation?

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 1 - Matter in Our Surroundings>Exercise>Q 13
Name a suitable technique to separate sand from ammonium chloride.
MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 1 - Matter in Our Surroundings>Exercise>Q 14
What is meant by saying that the latent heat of fusion of ice is 3.347×105 Jkg-1?
MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 1 - Matter in Our Surroundings>Exercise>Q 15

What is meant by saying that the latent heat of vaporisation of water is 22.5×105 J kg-1 ?

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 1 - Matter in Our Surroundings>Exercise>Q 16

Name the temperature at which a solid changes into a liquid.

(Choose one of the following: Boiling point/ Melting point).

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 1 - Matter in Our Surroundings>Exercise>Q 16

Name the temperature at which a liquid changes into a gas.

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 1 - Matter in Our Surroundings>Exercise>Q 17

Name one common substance which can be easily changed from one state to another by heating or cooling.