MEDIUM
9th CBSE
IMPORTANT
Earn 100

What do you understand by the term ‘latent heat’? What are the two types of latent heat?

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 25
Why is heat energy needed to melt a solid? What is this heat energy called? 
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 26
Under what conditions heat can be given to a substance without raising its temperature?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 27
Why does the temperature remain constant during the melting of ice even when the heat is supplied continuously?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 28
Why does the temperature remain constant during the boiling of water even though heat is supplied continuously?  
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 29
Explain why, ice at 0°C is more effective in cooling than water at the same temperature.
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 30
Would you cool a bucket of water more quickly by placing it on ice or by placing ice in it? Give reasons for your answer.
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 31

Why does steam cause more severe burns than boiling water?

HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 32
Which contains more heat, 1 kg of ice at 0°C or 1 kg of water at 0°C? Give reason for your answer.