G8 UT1 Revision

Iodine _____ on heating

• Melts

• Sublimes

The salt can be recovered from its salt solution by using a simple technique of

• Freezing

• Evaporation

Physical change is

• Reversible

• Temporary

• Composition is not altered

• New substances are formed

The stream produced can be __________ to recover the water

• Condensed

• Sublimed

Which of the following physical properties affect during a physical change

• Thermal and electrical conductivity

• Solubility

• Density

• Composition of a substance

Which of the following solid compounds directly converts into its gaseous phase

• Camphor

• Iodine

• Salt

• Sugar

Clouds are formed by

• Condensation

• Perforation

When water evaporates it takes up heat from the surroundings to change from liquid to gaseous state. This is an

• Exothermic reaction

• Endothermic reaction

When water freezes it gives out heat, so freezing ________ environment

• Cools

• Warms

Going down into the lake, temperature

• Increases

• Decreases