Separation techniques & mixtures

CHOOSE JUST ONE ANSWER A, B, C, OR D

Question 1

Which of these solids dissolves in water?

Sand chalk

SulphurSalt

Wrong Answer!salt

To crystallise salt

Question 2

When can filtration be used?

To separate a solid from a liquid

To separate two liquids

To separate a mixture of different coloured dyes

Wrong Answer!To separate a solid from a liquid

Question 3

During filtration, an insoluble solid collects in the filter paper. What is this called?

solute filtrate

residuesolvent

Wrong Answer!residue

Question 4

During filtration a liquid passes through the filter paper. What is this called?

chalk residue

insolublefiltrate

Wrong Answer!filtrate

Question 5

Which techniques could be used to get salt from a dry mixture of salt and sand

Dissolve the salt, filter the solution, recrystallise the salt

chromatography

Filter the dry mixture, crystallise the salt

Fractional distillation

Wrong Answer!Dissolve the salt, filter the solution, recrystallise the salt

Question 6

Sea water is a mixture, what does it consist of….?

Salt and gases water

Water, salt and gases

Water and salt

Wrong Answer!Water, salt and gases

Question 7

Which of these is a mixture?

oxygen Air

Quartz Copper sulphate

Wrong Answer!Air

Question 8

Which of these is not a mixture?

Sea water Calcium carbonate

Air Granite

Wrong Answer!Granite

Question 9

Which of these statement is true?

Mixtures have a fixed composition

In mixtures the atoms or compounds are joined together

Mixtures do not have a fixed composition

Mixtures are hard to separate

Wrong Answer!Mixtures do not have a fixed composition

Question 10

Which of these statement is true?

Compounds are easy to separate

Compounds have a fixed composition

In compounds the atoms or particles are not joined together

Compounds do not have a fixed composition

Wrong Answer!Compounds have a fixed composition

Congratulations!

• Your are great, well done.