Question

Which one of the following is not a property of solution?
A. Solution is a homogeneous mixture
B. Solution does not scatter light
C. Path of light is visible in solution
D. Solute particles do not settle down when left undisturbed

Answer 1

Hint: A homogeneous mixture of solute and solvent is called as solution. The solution will have only a liquid phase whereas the phase of the solute can vary and path of light is observed when the particles are scattered.

Complete answer:
Solution is a homogeneous mixture of 2 or more substances
Eg: Sugar solution (sugar+water)
Tincture and iodine (Iodine+alcohol)
Components of solution are solute and solvent. Solute is the component that is present in less amount and solvent is present in large amount. When light falls on any medium it interacts with the particles and gets reflected. When light is passed on water the path of light ray is not visible because the particles are present at distances. But when some amount of milk is added to water the path of light ray is visible because the milk particles get settled along with water particles and their size is much larger than water particles. Thus the light interacts with the milk particles and gets scattered. But when the solution which is physically constituted with two or more substances then the solution does not scatter light and the path of light will not be visible in solution.

Hence, the answer to the above question is option C.

Additional Information:
Sunlight enters a dusty room; here scattering of light occurs by the dust particles. Small solid particles that are suspended in a fluid are called colloidal particles. The phenomenon of scattering of light by the colloidal particles is known as Tyndall effect. Same effect is observed when sunlight passes in between the trees of dense forest the tiny droplets of mist scatter the light.

Note: The earth’s atmosphere is the mixture of minute particles, these particles include smoke, tiny water droplets, suspended dust particles and air molecules when sunlight hits these molecules they scatter and the colour of the scattered light is the colour of the light we see.