Matter in our surroundings

Due to increase in temperature, the particles vibrate with greater ………………

• Speed

• Distance

• Movement

• Time

In gaseous state, molecules can move ……………..

• only in one direction

• only in a fixed path

• randomly in all directions

• upward and downward only

The gases are highly compressible because …………….

• The molecules move randomly

• the molecular force of attraction is very weak

• The separation between molecules is very large

• The separating force is strong

The state of matter can be changed by varying ……………….

• pressure

• volume

• mass

• Temperature

On heating, a solid is converted to liquid. This change is called ………………..

• Melting

• Fusion

• Diffusion

• Freezing

The conversion of a liquid into vapour by heating is …………….

• Melting

• Condensation

• Freezing

• Evaporation

Gases have neither definite shape not definite ……………

• Mass

• Volume

• Weight

• Rigidity

The substances that does not have definite shape but definite mass is …………..

• Solid

• Matter

• Liquid

• Plasma

When Heat Is Constantly Supplied By A Gas Burner With Small Flame To Melt Ice, Then The Temperature Of Ice During Melting:

• Increases very slowly

• Does not increase at all

• First remains constant and then increases

• Increases to form liquid water

Which Condition Out Of The Following Will Increase The Evaporation Of Water?

• Increase in temperature of water

• Decrease in temperature of water

• Less exposed surface area of water

• Adding common salt to water