EASY
9th CBSE
IMPORTANT
Earn 100

Name the process in which a solid is directly changed into a gas. (Sublimation/ Deposition)

91.67% studentsanswered this correctly

Important Questions on Matter in Our Surroundings

EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Questions as per the Guidelines of CBSE>Q 8
In a substance the separating force is very large as compared to the cohesive force. What is the physical state of this substance? (Solid state/ liquid state/ gaseous state)
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Questions as per the Guidelines of CBSE>Q 9
In a substance the separating force is very weak as compared to the cohesive force. What is the physical state of this substance?  (Solid / Liquid / Gaseous)
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Questions as per the Guidelines of CBSE>Q 1
What is dry ice?
HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Questions as per the Guidelines of CBSE>Q 2
Name the factors which can cause increase in the rate of evaporation of a liquid.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Questions as per the Guidelines of CBSE>Q 3

Water kept in an earthen pot becomes cold after some time. Give reason.

MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Questions as per the Guidelines of CBSE>Q 4
Steam burn is more painful than the burn from hot water. Give reason.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Questions as per the Guidelines of CBSE>Q 5
Name the physical state of water under each one of the following conditions.
(a) At 25 °C and under atmospheric pressure.
(b) At 0 °C and under atmospheric pressure.
(c) At 100 °C and under atmospheric pressure.
 
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Questions as per the Guidelines of CBSE>Q 6
Convert the following temperature into Kelvin scale.
25 °C