Separation methods

Question 1

Pure substance have

Answer 1

Definite and sharp boiling points and melting points

Question 2

Separation method to separate a solid from a liquid

Answer 2

1.Filtration
2.Crystallization
3.Evaporation

Question 3

Separation method to separate mixtures of two solids

Answer 3

1.Handpicking or sieving
2.By using suitable solvent
3.Separation by sublimation
4.Magnetic separation
5.Gravity separation

Question 4

Filtration is used to separate

Answer 4

An insoluble solid from a liquid

Question 5

Crystallization is used to separate

Answer 5

a solute from its solution

Soluble solutes tends to be less soluble at lower temperature (အေးသွားရင် အနည်ကျ)
Eg.CuSO4

Question 6

Evaporation is used to separate

Answer 6

Soluble solute from its solution

Temperature change ll solubility m change loh solvent akone loh ko evaporate loke
Eg.Salt

Question 7

Salt and sand is separated by

Answer 7

by using suitable solvent Eg.water dissolves slat but not sand

Question 8

Salt and sugar is separate by

Answer 8

using suitable solvent i.e.Ethanol that dissolves sugar but not salt

Question 9

Sand and iron is separated by

Answer 9

magnetic separation

Question 10

Simple distillation is used to separate

Answer 10

a solvent from a solution
Eg.Separation of water from salt solution

Question 11

Fractional distillation is used to separate

Answer 11

mixture of two liquids from each other
(By using their different boiling points)

Eg.ethanol and water

Question 12

Chromatography is used to separate

Answer 12

different substances from solution