مادے کی طبعی حالتیں

Which state of matter has a fixed shape and a fixed volume?

• 1 Gas
• 2 Solid
• 3 Liquid
• 4 Plasma

The change of a solid directly into a gas is called:

• 1 Condensation
• 2 Sublimation
• 3 Melting
• 4 Freezing

At the same temperature, which gas diffuses the fastest?

• 1 Carbon dioxide
• 2 Oxygen
• 3 Hydrogen
• 4 Chlorine

Boyle's law says that at constant temperature the volume of a gas is inversely proportional to its:

• 1 Pressure
• 2 Colour
• 3 Mass
• 4 Density only

Evaporation takes place:

• 1 Only in a vacuum
• 2 At any temperature, from the surface
• 3 Only at the boiling point
• 4 Only in solids

A gas at 2 atm pressure has a volume of 4 L. At constant temperature, what is the volume at 4 atm?

• 1 4 L
• 2 2 L
• 3 8 L
• 4 1 L