Particles of suspension do not scatter beam of light when they settle down in the bottom , right??

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Q. Question 16
Explain why particles of a colloidal solution do not settle down when left undisturbed, while in the case of a suspension they do?

Q. Mark the correct statement(s).
(I) The solute particles settle down when suspension is left undisturbed.
(II) Particles of a suspension scatter a beam of light passing through it and makes its path visible.
(III) Suspension is a homogeneous mixture.

Q. Assertion :Particles of a colloidal solution do not settle down when left undisturbed, while in the case of a suspension they do. Reason: Particle size in a suspension is larger than those in a colloidal solution and molecular interaction in a suspension is not strong enough to keep the particles suspended

Q. The particles in a suspension scatter a beam of light passing through it.

Three mixtures A, B and C are obtained by stirring three different solids in water taken in separate beakers. When mixture A is allowed to stand for some time, then its particles settle at the bottom of the beaker. When a Beam of light is passed through mixture A in a dark room, the path of light becomes visible when observed from the side of the beaker. When mixture B is allowed to stand for a considerable time, even then its particles do not settle down. Mixture B, however, scatters the beam of light just like mixture A. The particles of mixture C do not settle down on keeping and it also does not scatter a beam of light passing through it

(a) What are the mixtures like A known as ?

(b) What are the mixtures like B known as ?

(d) Name the phenomenon exhibited by A and B which occurs on passing a beam of light through them

(e) Name one mixture each which is like (i) A (ii) B, and (iii) C.

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