Name the separation techniques which you will apply for the separation of the following mixtures:
Q. (a) Name the separation techniques which you will apply for the separation of the following mixtures:
(i) small pieces of metal in the engine oil of a car.
(ii) fine mud particles suspended in water.
(iii) oil from water.
(iv) sodium chloride from its solution in water.
(v) camphor from salt.
(vi) wheat grains from husk.
(b) Classify the following as a chemical or physical change:
(i) Water boils to form steam.
(ii) Burning of paper.
(iii) An almirah gets rusted.
(iv) Making a fruit salad with raw fruits.
Ans. (a) (i) filtration (ii) centrifugation (iii) separating funnel (iv) evaporation (v) sublimation (vi) winnowing
(b) Chemical change : (ii) and (iii) Physical change : (1) and (iv)
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