Q8 of 25 Page 154

Beaker A has sugar mixed with water and Beaker B has starch dissolved in water.

i) Which solution will scatter light?


ii) In which beaker does the Brownian movement take place?


iii) Name the type of solution that beaker A and beaker B contain.


iv) Which of the two solutions is homogeneous?


v) Identify the beaker that has particles of size 10Å to 2000Å

i) Solution in beaker B

Explanation: Sugar mixed with water will form a true solution having very small particle size and particles of such small size would not be able to scatter light. So the solution present in beaker B will scatter light because starch dissolved in water will form a colloidal solution and a colloidal solution scatters the light.


ii) Beaker B


Explanation: Brownian movement is the phenomenon of continuous random motion of colloidal particles and colloidal particles are present in beaker B. Therefore the Brownian movement takes place in beaker B.


iii) Beaker A= True solution Beaker B= Colloidal solution


Explanation: Since sugar gets completely dissolved in water forming a homogenous solution, thus the solution present in beaker A is true solution. But the starch molecules are bigger in size and they form a colloidal solution. So beaker B has colloidal solution.


iv) The solution present in beaker A is homogenous.


Explanation: Only true solutions are homogenous in nature and solution in beaker A is true solution. Therefore solution in beaker A is homogenous while the solution in beaker B is heterogenous.


V) Beaker B


Explanation: The colloidal particles have a size range of 10Å to 2000Å and beaker B is having the colloidal solution. The particle size range for a true solution is 1Å to 10Å.


More from this chapter

All 25 →