Question

.Write the observation for following: 3
(i) Milk is rotated at a very high speed in a mixer.
(ii)Super saturated Copper sulphate solution is cooled.
(iii) Chalk powder solution is left undisturbed for some time.

Answer 1

Answer:

I)The process of centrifugation is used in dairies to separate cream from milk . ... when the centrifuge machine is switched ON, the milk is rotated at very high speed in a container. Due to this process, milk separates into cream and skimmed milk.

ii)What will happen if this solution is allowed to cool? ... The solution so obtained is a saturated solution of copper sulphate at 50°C. On cooling, the solubility of copper sulphate will decrease and it will start settling down at the bottom of the beaker

iii)The mixture of chalk powder and water can be separated by condensation and evaporation. The particles of chalk powder when left undisturbed settle at the bottom. The particles of chalk powder will also scatter a beam of light passing through it. -A mixture of common salt and water forms a clear solution.