MEDIUM
9th CBSE
IMPORTANT
Earn 100
Red brown bromine vapour diffuse into air in a gas jar but the colourless air molecules do not diffuse into bromine vapour.
44.83% studentsanswered this correctly
Important Questions on Matter in Our Surroundings
EASY
9th CBSE
IMPORTANT
A bottle of perfume was opened in a room. The smell of its vapours spread in the entire room. Name the property of gases which is responsible for this behaviour of perfume vapours.
EASY
9th CBSE
IMPORTANT
If the fish is being fried in a neighbouring home, we can smell it sitting in our own home. Name the process which brings this smell to us. (Concentration/ Diffusion)
MEDIUM
9th CBSE
IMPORTANT
Name one property of liquids and gases which tells us that their molecules are moving constantly. (Diffusion/ Attraction)
MEDIUM
9th CBSE
IMPORTANT
The smell of perfume gradually spreads across a room due to _____.
EASY
9th CBSE
IMPORTANT
Solid, liquid and gas are the three _____ of matter.
EASY
9th CBSE
IMPORTANT
At room temperature, the forces of attraction between the particles of solid substances are _____ than those which exist in the gaseous state. (more / less)
MEDIUM
9th CBSE
IMPORTANT
State two characteristics of matter demonstrated by diffusion.
MEDIUM
9th CBSE
IMPORTANT
State two characteristics of matter demonstrated by Brownian motion.
