EASY
9th CBSE
IMPORTANT
Earn 100

Diffusion of gases in water is essential. Explain the term with suitable example. 

Important Questions on Matter in Our Surroundings

EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 1 - Matter in Our Surroundings>ASSESS YOURSELF>Q 38
People sprinkle water on open ground or roof on a hot sunny day. Why?  
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 1 - Matter in Our Surroundings>ASSESS YOURSELF>Q 39
On a hot humid day, why do people perspire a lot?
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 1 - Matter in Our Surroundings>ASSESS YOURSELF>Q 40
Why a balloon kept in the Sun burst after sometime?
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 1 - Matter in Our Surroundings>ASSESS YOURSELF>Q 41
Ice at 273K is more effective in cooling than water at 273 K. Why?
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 1 - Matter in Our Surroundings>ASSESS YOURSELF>Q 42
Why does the temperature remain constant during the change in the state for a substance?
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 1 - Matter in Our Surroundings>ASSESS YOURSELF>Q 43
Out of honey or ink which will diffuse faster and why?
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 1 - Matter in Our Surroundings>ASSESS YOURSELF>Q 44
Convert 100°C to Kelvin scale.
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 1 - Matter in Our Surroundings>ASSESS YOURSELF>Q 45
Why does water have high boiling point than alcohol? At what temperature in Kelvin, it can be changed into solid state and into vapours?