MEDIUM
9th CBSE
IMPORTANT
Earn 100

Why are we able to sip hot tea or milk faster from a saucer rather than from a cup? 

Important Questions on Matter in Our Surroundings

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 54
Why does our palm feel cold when we put some acetone (or perfume) on it?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 55
How will you demonstrate that water vapour is present in air? 
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Long Answer Type Questions>Q 56

Define the term ‘latent heat of fusion’ of a solid. How much is the latent heat of fusion of ice? 

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Long Answer Type Questions>Q 56
 Draw a labelled diagram of the experimental set-up to study the latent heat of fusion of ice. 
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Long Answer Type Questions>Q 57

Define the term ‘latent heat of vaporization’ of liquid. What is the value of the latent heat of vaporization of water? 

HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Long Answer Type Questions>Q 57
Draw a labelled diagram of the experimental set-up to study the latent heat of vaporization of water. 
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Long Answer Type Questions>Q 58

What is sublimation? Name two substances (other than ammonium chloride) which undergo sublimation. 

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Long Answer Type Questions>Q 58
Draw a labelled diagram of the experimental set-up to demonstrate the sublimation of ammonium chloride.