MEDIUM
9th CBSE
IMPORTANT
Earn 100

Give one example of diffusion of gases in a liquid. 

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 43
Give reason for the following observation:
The smell of hot sizzling food reaches us even from a considerable distance but to get the smell from cold food, we have to go close to it.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 44
Explain how, the smell of food being cooked in the kitchen reaches us even from a considerable distance.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 45
Explain why, when a bottle of perfume is opened in a room, we can smell it even from a considerable distance.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 46
When a crystal of copper sulphate is placed at the bottom of a beaker containing water, the water slowly turns blue. Why? 
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 47
Honey is more viscous than water. Can you suggest why? 
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 48
Explain why air is used to inflate tyres. 
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 48
Explain why steel is used to make railway lines. 
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 49
Explain why, diffusion occurs more quickly in a gas than in milk.