MEDIUM
9th CBSE
IMPORTANT
Earn 100

Why does ethanol evaporate faster than water?

Important Questions on Matter in Our Surroundings

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>EXERCISES>Q 23

Why does water evaporate faster in a Petri dish than in a test tube?

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>EXERCISES>Q 24
Why does it take longer time for the evaporation process on a rainy day?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>EXERCISES>Q 25
Give an example which indicates that evaporation is a cooling process.
HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>EXERCISES>Q 26

Why does the temperature remain constant during the change of state?

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>EXERCISES>Q 27

Why do we feel cool under a fan when we perspire?

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>EXERCISES>Q 1

Why does our palm feel cold when we put some acetone, ethyl alcohol, petrol or perfume on it?

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>EXERCISES>Q 2

What is the fifth state of matter? Who discovered it?

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 1 - Matter in Our Surroundings>EXERCISES>Q 3
What would happen to the interparticle forces of attraction when a solid changes into a liquid?