Question

1. Which of the following settles down when allowed to stand undisturbed doe
sometimes? (1)
a. Copper sulphate solution
b. Blood
c Muddy water
d. Solution of egg albumin in water​

Answer 1

Answer:

option (c) OK

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Answer 2

Answer:

Of the given mixtures, c. muddy water will have a separate layer of mud settle down when left undisturbed for some time.

Explanation:

• Copper sulphate when mixed with water, completely dissolves in it and forms a true solution. The particles of copper sulphate are small and light, Thus they do not settle down.

• Blood is a colloid which has small particles suspended in a water medium. Particles of blood mix with water, remain suspended and do not settle  down when left undisturbed,

• Egg albumin in water forms a colloid with particle size such that they remain suspended in water and do not  settle at the bottom of the container.

• Water that is muddy will sink because the particles are heavy and gravitationally inclined to do so. Sedimentation is the process of coarse particles settling under the effect of gravity. Heavy particles settle down more quickly during sedimentation than finer particles do.