MEDIUM
9th CBSE
IMPORTANT
Earn 100

Give reason for the following observation:

We can get the smell of perfume sitting several metres away.

Important Questions on Matter in Our Surroundings

MEDIUM
9th CBSE
IMPORTANT
Arrange the following substances in increasing order of forces of attraction between particles- water, sugar, oxygen.
EASY
9th CBSE
IMPORTANT
What is the physical state of water at
(a) 25°C
(b) 0°C
(c) 100°C
MEDIUM
9th CBSE
IMPORTANT

Give two reasons to justify-

Water at room temperature is a liquid.

EASY
9th CBSE
IMPORTANT

Give two reasons to justify-

An iron almirah is a solid at room temperature.

MEDIUM
9th CBSE
IMPORTANT
Why is ice at 273 K more effective in cooling than water at the same temperature?
MEDIUM
9th CBSE
IMPORTANT
What produces more severe burns, boiling water or steam?
MEDIUM
9th CBSE
IMPORTANT

Name A, B, C, D, E and F in the following diagram showing change in its state.

http://cdn.topperlearning.com/topper/bookquestions/589_m1.JPG