Matter in our surroundings

The substances which occupy some space and having some mass called

• Particles

• Impure substance

• Ions

• Matter

Particles of matter having space between them is called

• Interstitial space

• Intermolecular space

• Vacant space

• None of the above

On which factors evaporation does not depend

• Humidity

• Temperature

• Surface area

• Quality of matter

The temperature at which vapour pressure of liquid is equal to atmospheric pressure is

• Melting point

• Freezing point

• Boiling point

• None of the above

Which is known as dry ice.

• CO2

• H2O

• Fruit ice

• Both a &b

The amount of heat which is used to change the state of matter not for increase the temperature is called

• Latent heat

• Specific heat

• Heat capacity

• None of the above.

The process in which solid is directly convert into gas is called

• Condensation

• Boiling

• Evaporation

• None of the above.

Convert 473k into degree Celsius

(a)  

What is the unit of pressure?

(a)  

What will be the impact on the density of matter if we heat or decreases the pressure of the matter?

• Increase

• Decrease

• First increase then decreases

• First decreases then increase

• None of the above