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- 1. Multiple Choice
Filtration is a method to separate the components of a
(a) solution
b) mixture of a liquid and an insoluble substance
(c) both (a) and (b)
(d) pure substance
- 2. Multiple Choice
Threshing is done by
(a) beating
(b) bullocks
(c) machines
(d) all of these
- 3. Multiple Choice
Which method is used to separate pebbles and stones from sand?
(a) Handpicking
(b) Winnowing
(c) Sieving
(d) Any of these
- 4. Multiple Choice
The property which forms the basis of sieving
(a) difference in weight
(b) difference in colour
(c) difference in shape
(d) difference in size
- 5. Multiple Choice
Mixtures need to be separated because
(a) to remove undesirable substances
(b) to get desirable substances
(c) to obtain highly pure substances
(d) all of the above
- 6. Multiple Choice
A solid is dissolved in water. Which one of the following methods can be used to separate it?
(a) Filtration
(b) Decantation
(c) Distillation
(d) Evaporation
- 7. Multiple Choice
Which of the following method is used when there is a difference in size and colour of desirable and undesirable constituents?
(a) Handpicking
(b) Threshing
(c) Filtration
(d) Decantation
- 8. Multiple Choice
At water treatment plants, the river water is filtered by using
(a) filter paper
(b) porcelain filters
(c) cloth filters
(d) sand filters
- 9. Multiple Choice
When no more salt dissolves in water at a particular temperature, then the solution at that temperature is called
(a) unsaturated
(b) saturated
(c) supersaturated
(d) none of these
- 10. Multiple Choice
Distillation is a method of obtaining pure …………….. from a solution.
(a) liquid
(b) solid
(c) gas
(d) all of them
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