Worksheet based on Properties of colloids

Some of the properties of colloids are as follows:

1. A colloid is a hetrogenous solution but it appears to be homogenous solution.

2. Most of the particles of colloids cannot be seen even through microscope.

3. Colloids can’t be seperated by the process of filtration because colloid can pass through filter paper.

4.  A colloid scatters a beam of light when passing through it because it’s particle are fairly large. And this process is known as Tyndal effect.

Here, you can find some questions related to “Properties of colloids” and their answers:


1. In which of the following Tyndall effect is not observed?

(a)    gold sol

(b)   sugar solution

(c)    emulsions

(d)   suspension


2. The movement of colloidal particle under the influence of electric field is called:

(a)    electro—dialysis

(b)   electro-osmosis

(c)    electrolysis

(d)   electrophoresis


3. Which of the following has maximum flocculation value for a negatively charge solution ?

(a)    BaCl_2

(b)   NaCl

(c)    AlCl_3

(d)   MgCl_2


4. The capacity of an ion to coagulate a colloidal solution depends upon:

(a)    Nature of charge

(b)   Amount of charge

(c)    Its shape

(d)   Both (a) and (b)


5. The simplest way to check whether a system is colloid or not in is by:

(a)    Tyndall effect

(b)   Electrodialysis

(c)    Finding out particle size

(d)   Brownian movement


6. Which of the following ions has minimum flocculation value?

(a)    PO^{3-}_4

(b)   SO^{2-}_4

(c)    [Fe(CN)_6]^{4-}

(d)   Cl^-


7. When a strong beam of light is passed through a colloidal solution, the light is:

(a)    reflected

(b)   scattered

(c)    both (a)& (b)

(d)   none of these


8. Scattering of light takes place in:

(a)    electroplating

(b)   electrolysis

(c)    solutions of electrolyte

(d)   colloidal solution


9. Which of the following is used for the destruction of colloids?

(a)    ultrafiltration

(b)   adding electrolyte

(c)    both (a) & (b)

(d)    dialysis


10. Gold number is associated with

(a)    Protective colloids

(b)   Electrophoresis

(c)    Amount of pure gold

(d)   Purple of caseius


11. If gold number of A, B, C and D is 0.005, 0.05, 0.5 and 5 respectively, then which of the following will have the greatest protective value ?

(a)    A

(b)   B

(c)    C

(d)   D


12. The movement of colloidal particles towards the oppositely charged electrodes on passing electric current is known as:

(a)    Tyndall effect

(b)   cataphoresis

(c)    Brownian movement

(d)   none of these


13. The concentration of electrolyte required to coagulate given amount of As2S3 solution is minimum in case of :

(a)    potassium sulphate

(b)   aluminium nitrate

(c)    magnesium nitrate

(d)   potassium nitrate


14. If a beam of light is passed through a true solution, then it:

(a)    is not visible

(b)   is visible

(c)    will scatter

(d)    none of these


15. Which of the following is not related to colloids?

(a)    Ultrafiltration

(b)   dialysis

(c)    Brownian movement

(d)   wavelength


1.(b)        2. (d)       3. (b)      4. (d)       5. (c)

6. (a)       7. (b)       8. (d)      9. (b)       10. (a)

11. (a)     12. (b)     13. (b)     14. (a)      15. (d)

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