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 sometime, 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 the beam of light passing through it.

a. What are the mixtures like A known as?

b. What are the mixtures like B known as?

c. What are the mixtures like C known as?

d. Name the phenomenon exhibited by A and B with the beam of light.

e. Name one mixture each which is like A, B and C.

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Solution

$a) A s e t t l e s a t t h e b o t t o m o f t h e b e a k e r, s o i t s p a r t i c l e s a r e i n t h e f o r m o f s u s p e n s i o n a n d t h e p a t h o f l i g h t i s v i s i b l e w h e n i t s p a s s e d t h r o u g h t h i s s o l u t i o n . b) B p a r t i c l e d o e s n o t s e t t l e b u t t h e b e a m o f l i g h t i s s c a t t e r e d . S o i t s p a r t i c l e s a r e c o l l o i d s c) C d o n o t s e t t l e a n d i t d o e s n o t s c a t t e r t h e b e a m o f l i g h t . S o i t s t r u e s o l u t i o n . d) A a n d B t h a t i s s u s p e n s i o n a n d c o l l o i d s s h o w t h e p h e n o m e n o n o f T y n d a l l e f f e c t . T y n d a l l e f f e c t i s p a t h o f l i g h t i s v i s i b l e, a s l i g h t i s s c a t t e r e d b y c o l l o i d a l p a r t i c l e s . e) A - S a n d w a t e r B - C l o u d C - S u g a r s o l u t i o n$

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Similar questions

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.

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. Do homogeneous mixture scatters a beam of light?

Q. Insoluble solid particles settle at the bottom in a solid-liquid mixture. These are collectively known as .

Q. The particles of a colloidal solution do not settle down with time and form a stable mixture.

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