separation of substances

what is separation ?

• mixing two different components

• selecting different kinds of components from a mixture

• arranging things in an order

• none of the above

best method to remove husk from seed or grains

• winnowing

• threshing

• sieving

• hand picking

hand picking is a method of -

• removing large size impurities b hand

• removing small impurities by hand

• removing husk by wind

• removing chaff by wind

the tool sieve has -

• no holes for separation

• big holes for separation

• small holes for separation

• 1 big hole for separation

both sedimentation and decantation is important to clean the water

• true , both is needed

• false , only sedimentation

• false , only decantation

• false , none of them is required

in process filtration we use which paper

• butter paper

• foil wrap

• sheet paper

• filter paper

evaporation is a process in which -

• water turns to water vapour on boiling

• water turns to ice on freezing

• water turns to water vapour by natural heat

• none of the above

petrol is soluble in water.

• true

• false

which of the following methods are used in kitchen for separation

• sieving

• winnowing

• threshing

• hand picking

which of the following is a use of evaporation

• removing sea water to obtain salt

• removing tea leaves from tea

• removing mud from water

• removing seeds from lemonade