Question

Which of the following among shows Tyndal effect
A. Milk of magnesia
B. Foam
C. Butter
D. Mud
give 2 answer​

Answer 1

$\sf\huge\bold{Answer:}$

⇒What is tyndall effect ?

Tyndall effect is defined as scattering of a beam of light by a medium containing small suspended particles.

Which solutions show tyndall effect ?

Tyndall Effect is seen in the colloidal solution because of the interaction of visible spectrum of light with the constituent particles of a colloidal solution and a few fine suspensions.

Which solutions do not show tyndall effect ?

Tyndall Effect is not shown by a true solution because the size of the constituent particles is smaller than 1nm i.e. the wavelength of the visible spectrum

Dependency of showing tyndall effect :

higher is the interaction between the particles and the light beam, more is the scattering of light and higher is the probability of seeing a Tyndall Effect. 

$\fbox{Milk of magnesia}$

Whenthe beam of light is passed through Milk of magnesia, then the tyndall effect is observed as the particles of milk of magnesia(colloid) acts as a barrier to the beam.

Thus the tyndall effect is observed.

$\fbox{Foam}$

Foam is a colloid.Hence,it scatters light and shows tyndall effect.

$\fbox{Butter}$

Butter is a colloid as there are water molecules trapped in between the fat but it does not make the beam visible .Thus no tyndall effect is observed.

$\fbox{Mud}$

Mud does not show tyndall effect because they do not make the pth visible.But muddy water shows tyndall effect.

So,option a) and b) shows correct answers

$\sf\huge\bold\blue{ツ}$