HARD
9th CBSE
IMPORTANT
Earn 100

Explain why steam at 100oC is better for heating purposes than boiling water at 100oC. 

Important Questions on Matter in Our Surroundings

HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 35
Which produces more severe burns: boiling water or steam? Why?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 36
Why does the temperature of a substance remain constant during the change of state?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 37

What is the physical state of water at 0°C ?

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 37
What is the physical state of water at 25°C?
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 37
What is the physical state of water at 100°C?
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 37
What is the physical state of water at 250°C?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 38
Explain why there is no rise in temperature of a substance when it undergoes a change of state though heat is supplied continuously.
EASY
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 39
Define ‘melting point’ of a substance? What is the melting point of ice?