Matter in our surroundings - 02

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

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.

Which one of the following is an example of a fluid?

• Oxygen

• Carbon

• Phosphorus

• Sulphur

235K = _________°C

• 38

• -20

• 20

• -38

Which of the following statements is NOT true?

• The molecules in a liquid and a gas can flow.

• The molecules in a liquid are arranged in a regular pattern.

• The molecules in a gas move about randomly at high speed.

• The molecules in a solid vibrate about a fixed position

Name the process by which dry ice changes into carbon dioxide gas.

• Evaporation

• Condensation

• Sublimation

• Vaporisation