MEDIUM
9th CBSE
IMPORTANT
Earn 100

What type of clothes should we wear in summer?

Important Questions on Matter in Our Surroundings

MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 1
Convert the following temperatures to celsius scale.
(a) 293 K
(b) 470 K
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 2
Convert the following temperatures to Kelvin scale.
(a) 25°C
(b) 373°C
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 3

Give reason for the following observation.

Naphthalene balls disappear with time without leaving any solid.
 

MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 3

Give reason for the following observation:

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

MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 4
Arrange the following substances in increasing order of forces of attraction between particles- water, sugar, oxygen.
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 5
What is the physical state of water at
(a) 25°C
(b) 0°C
(c) 100°C
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 6

Give two reasons to justify-

Water at room temperature is a liquid.

EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 1 - Matter in Our Surroundings>Exercises>Q 6

Give two reasons to justify-

An iron almirah is a solid at room temperature.