Separation of Substances

What is a saturated solution?

• A solution in which more solute can be added

• A solute that has no more space to dissolve a solvent

• A solvent in which there is no more space there to dissolve the solute

For filtration, the particles of the insoluble solid should be ________________ than the holes in the filtering device.

Sieving is used for separating two substances with ________________________ sizes.

• A. Different

• B. Same

• C. Similar

• D. Both A nd C

What can increase the solubility of a solvent?

• Letting it standstill

• By keeping the solvent in the freezer

• By decreasing the solvent

• By heating the solvent

A machine that reaps and cleans the crop

Explain the following-

Winnowing-

• Beating the crop to separate grains from stalks

• Separating grains from the chaff by river

• Putting the grains in shallow pits and evaporate them

• Separating grains from the chaff by wind

Evaporation is _________________ of condensation

• similar

• friend

• operation

• opposite

• enemy

Find which is the oldest way of separating salt and seawater

• By putting the seawater in a basket and picking up salt

• By using filtration

• By collecting seawater in shallow pits and letting the water condense

• By collecting seawater in shallow pits and letting the water evaporate

What is happening in the following picture

• Tea being separated from tea leaves

• Putting the tea into the container

• Tea used for filtration

• Tea being strained

Solvent + solute=