Matter in Our Surroundings (Class

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Matter in Our Surroundings (Class - IX)

Description: Matter
Number of Questions: 23
Created by: Sanjiv Memon
Tags: Matter Properties of Matter Matter & Classification Melting, Melting Point Boiling, Boiling Point Sublimation, Sublime & Sublimate Evaporation and Factors Affecting the Rate of Evaporation

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Which of the following substances has the highest force of attraction among its particles?

Air
Water
Gel
Stick

Which of the following influences intermolecular forces?

Intermolecular space
Radius of molecules
Colour of the molecules
Chemical properties of molecules

Which of the following cannot be a property of molecules of a substance?

Small in size
Variable in shape
Possess kinetic energy
Attract each other

Which of the following determines the physical nature of a chemical substance?

Molecular weight
Molecular motion
Molecular shape
Molecular reactivity

Which of the following has the highest force of attraction between its particles?

Juice
Bat
Honey
Methane

What is the force of attraction between similar particles called?

Adhesion
Cohesion
Collision
Fusion

What does melting point of a solid indicate?

Randomness of its particles
Strength of force of attraction between particles
Kinetic energy of particles
Inter molecular space between particles

What is the effect of heating on kinetic energy of molecules?

Decrease in K.E.
No effect
Increase in K.E.
May increase or decrease in K.E.

In which of the following are the particles vibrate about their mean position?

Iron
Water vapour
Perfume
Acid

Which of the following is responsible for definite shape of an iron ball?

Strong forces of attraction between molecules of iron ball
Large distance between the molecules of iron ball
High speed of molecules of iron ball
Random motion of molecules of iron ball

Dry ice at room temperature is converted into gas directly. What is this process called?

Melting
Vaporisation
Condensation
Sublimation

In which process is heat energy transformed into potential energy?

Freezing
Cooling
Melting
Boiling

How is the force of attraction between the particles of a liquid affected during evaporation process?

The force of attraction remains unchanged.
The force of attraction increases.
The force of attraction decreases.
The force of attraction first increases and then decreases.

Which of the following is a gas at room temperature?

Water
Dry ice
Copper
Alcohol

Which of the following processes can occur in the absence of heat?

Melting
Boiling
Sublimation
Vapourisation

What makes water to take the shape of the container in which it is poured?

Weak forces of attraction between molecules
Vibration of particles about their mean position
Arrangement of particles in a definite manner
Absence of space between particles

Which of the following has the weakest intermolecular forces between its particles?

Gel
Water
Carbon dioxide
Glass

Fragrance of perfume spreads rapidly in a room. What is the reason behind this phenomenon?

High kinetic energy of particles of vapour
Strong force of attraction among particles
Large number of particles
Lack of definite shape of gas particles

Which of the following does not have definite shape and volume?

Mercury
Methane
Milk
Marble

Which of the following has the highest kinetic energy in its particles?

Oxygen
Mercury
Vinegar
Bullet

Which of the following statements is not true about particles of oxygen?

They have large intermolecular distance between them.
They have negligible force of attraction between them.
They vibrate around their mean position.
They have high kinetic energy.

Which of the following is not true for boiling process?

It is a rapid process.
It takes place at the surface of a liquid.
It takes place at definite temperature.
It converts liquid into vapour.

Which of the following is true for evaporation?

It occurs at all temperatures.
It is a fast process.
It occurs throughout the water body.
It heats the surroundings.

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Matter in Our Surroundings (Class - IX)

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