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9th CBSE
IMPORTANT
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The conversion of a solid directly into a gas is called .

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Important Questions on Matter in Our Surroundings

EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Problems for Proficiency>Q 8
Vaporisation is a process in which a _____ (liquid / solid) is changed into vapour.
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9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Problems for Proficiency>Q 8
_____ is the process in which a vapour is changed into liquid.
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9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Problems for Proficiency>Q 8
Evaporation of liquid is a _____ phenomenon.
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Problems for Proficiency>Q 9
In gases the constituent particles are far apart.
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9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Problems for Proficiency>Q 9
In solids, the separating forces are stronger than the attracting forces.
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Problems for Proficiency>Q 9

The kinetic energy of particles of every substance must increase on heating.

EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Problems for Proficiency>Q 9

Choose true and false statement from the following. If a statement is false then write its correct form:

Change of temperature affects the separation and forces between the constituent particles of the substances.

EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 1 - Matter in Our Surroundings>Problems for Proficiency>Q 9

Choose true and false statement from the following. If a statement is false then write its correct form:

Direct conversion of a solid into a gas is called sublimation.