Assignment 2 on chapter separation of substances

Question 1
Suggest ways to separate a mixture of

(a) camphor,sand and salt.
Answer- steps
1 Sublimation
2 filtration
3 evaporation


(b) Saw dust, common salt and iron nails
steps
1 magnetic separation
2 filtration
3 evaporation

(c)ammonium chloride ,common salt and chalk powder

Steps
1 sublimation
2  filtration
3 evaporation

Question 2 Define Adulteration,harvesting and Evaporation

Answer- Adulteration Mixing harmful and cheap substances with the pure
substance to gain more profit is called adulteration.

Harvesting-The process of cutting and collecting the ripened crop is called harvesting.

Evaporation-The process in which liquid changes into gaseous state
on heating is called evaporation.