Question

7. The insoluble solid left behind on the filter during filtration is called residue
c. Write true or false. Correct the false statements.
pure subtances
A mixture has a definite set of properties. Folse
2. The constituents of a mixture can be separated by simple physical means. True
3. Petroleum is a mixture of groups of compounds such as bitumen, diesel and petroleum gas. True
4. Sieving is a better method of separating bran and wheat flour than winnowing. True
5. Lighter particles are separated from heavier particles in a mixture by winnowing. True
6. Common salt sublimes on heating whereas ammonium chloride does not. False
7. We can get water from a mixture of salt and water by evaporation. False
2. Match the columns
1. Separating sawdust from water
2. Separating iron filings from sand
. Separating sodium chloride from ammonium chloride
Separating common salt from sea water
Separating chaff from grains
X distillation
b. sublimation 3
c. winnowing 5
d. magnetic separation 2
e. filtration 1
f. evaporation 4
sulphur is
Answer the following in short.
Differentiate between a pure substance and a mixture.
What happens when carbon disulphide is added to a mixture of iron filings and sulphur?
Differentiate between handpicking and sieving.
What is winnowing?
What is sublimation?
Differentiate between sedimentation and decantation.
What is filtration?
Answer the following in detail.
Vhat are mixtures? Give three characteristics of mixtures.
ifferentiate between a compound and a mixture.
tate the need for separation of mixtures.
kplain the method of separating magnetic constituents from a mixture.
escribe the process of sublimation used to separate a mixture.
plain the techniques of separation involved in a filtration b. evaporation.
aw labelled diagrams of the following.
show the separation of a mixture of common salt and ammonium chloride by sublim
show the separation of sawdust from water​

Answer 1

Answer:

sorry I can't answer this much big question

Answer 2

Answer:

in handpicking we use hands and in sieving we use sieve for separation