A mixture containing potatoes, salt and sawdust has been
given to you. Outline a stepwise procedure for separating
each component from this mixture.
During the COVID-19 pandemic, all of us wore masks.
Generally, what material are they made of? What is the role
of these masks?
Can you relate the presence of nasal hair to any separation
process?
In what situations would you use decantation instead of
filtration to separate solids from liquids?
State with reason(s) whether the following statements are
True [T] or False [F]. Also, correct the False statement(s).
(i) Salt can be separated from salt solution by
keeping it under the Sun. [ ]
(ii) Handpicking should be used only when the
quantity of one component is less. [ ]
(iii) A mixture of puffed rice and rice grains can be
separated by threshing. [ ]
(iv) A mixture of mustard oil and lemon water can
be separated by decantation. [ ]
(v) Sieving is used to separate a mixture of
rice flour and water. [ ]
State with reason(s) whether the following statements are
True [T] or False [F]. Also, correct the False statement(s).
(i) Salt can be separated from salt solution by
keeping it under the Sun. [ ]
(ii) Handpicking should be used only when the
quantity of one component is less. [ ]
(iii) A mixture of puffed rice and rice grains can be
separated by threshing. [ ]
(iv) A mixture of mustard oil and lemon water can
be separated by decantation. [ ]
(v) Sieving is used to separate a mixture of
rice flour and water. [ ]
Which factor is usually essential for the filtration?
(i) Apparatus size (ii) Presence of air
(iii) Pore size (iv) Temperature of the
mixture
Which of the following substances are commonly separated
using the churning method?
(i) Oil from water (ii) Sand from water
(iii) Cream from milk (iv) Oxygen from air
What purpose does handpicking serve in the process of
separation?
(i) Filtration (ii) Sorting
(iii) Evaporation (iv) Decantation
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