EASY
9th CBSE
IMPORTANT
Earn 100

Which of following substances sublime: 

Ice, iodine, mercury, solid carbon dioxide.

Important Questions on The Matter in Our Surroundings

EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 3
In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
(i) Increasing pressure on hydrogen contained in a closed container.
(ii) Some hydrogen gas leaking out of the container.
(iii) Increasing the volume of the container of hydrogen gas.
(iv) Adding more hydrogen gas to the container without increasing the volume of the container.
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 4
Why does the temperature of a substance remain constant during its melting point or boiling point?
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 1

Name the change of state in the formation of clouds.

EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 1

Name the change of state in the drying of wet clothes.

EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 1

Name the change of state in the following :

"Naphthalene ball becoming small, when kept in open air".

EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 1

Name the change of state in the following: 

Wax kept in sunshine.

EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 2

State your observation, when: 

Ammonium chloride is heated in a hard glass test tube.

EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 2

State your observation, when:

Carbon dioxide gas is compressed at 70 atmospheric pressure.