Tyndall Effect

Q.

What is the range of size of dispersed phase particles in a colloidal solution?

Q. Which property of colloids is not dependent on the charge on colloidal particles ?

1. Electrophoresis
2. Electro - osmosis
3. Tyndall effect
4. Coagulation

Q. Colour of colloidal solution depends on:

1. Size and nature of colloidal particles
2. formation of complex
3. formation of hydrated crystal
4. None of the above

Q. Which property of a colloidal solution is independent of charge on the colloidal particles?

1. Electro-osmosis
2. Tyndall effect
3. Coagulation
4. Electrophoresis

Q.

What do you observe when a fine beam of light enters a dark room through a small hole?

Q. Lyophilic sols could be coagulated by

1. Adding an excess of an electrolyte
2. Adding a suitable solvent that dehydrates the dispersed phase and then adding an electrolyte
3. Shaking the colloidal solution
4. Adding more dispersion medium

Q. In which of the following both the dispersed phase and dispersion medium are not liquid?

Q. 3.Most effective coagulant for a colloidal solution ofarsenic sulphide in water is(1) 0.1 M sodium phosphat2) 0.1 M zinc sulphate(3) 0.1 M zinc nitrate(4) 0.1 M aluminium chloride

Q.

Can paint have dispersed particles?

Q.

What buffers are recommended for electrophoresis of DNA?

Q. what is dispersion method?

Q. Which of the following properties of colloids involve scattering of lights?

1. Colligative properties
2. Tyndall effect
3. None of the above
4. Brownian movement

Q. Which of the following is/are based on the Tyndall effect?

1. Tail of a comet
2. Blue colour of the sky
3. Deltas
4. Coagulation

Q.

In Tyndall effect the colloidally suspended particles:

1. show Brownian movement

2. trace out the path of strong beam of light

3. coagulate

4. show electrophoresis

Q.

Which condition is required to show the Tyndall Effect by the colloidal solution?

1. The refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude.

2. The refractive indices of the dispersed phase and the dispersion medium are exactly the same in magnitude

3. The refractive indices of the dispersed phase and the dispersion medium do not differ much in magnitude

4. None of these

Q. Which of the following solution(s) shows Tyndall effect ?

1. Salt solution
2. Milk
3. $CuS{O}_4$ solution
4. Starch solution

Q. Which of the following shows the Tyndall effect?
(I) Common salt
(ii) milk
(iii) Copper sulphate solution
(iv) Starch solution

1. (i) and (ii)
2. (ii) and (iv)
3. (ii) and (iii)
4. (iii) and (iv)

Q. The charges on the colloidal $CdS$ sol and $Ti{O}_2$ sol are, respectively

1. positive and negative
2. negative and negative
3. negative and positive
4. positive and positive

Q. Brownian movement of colloidal particles refers to:

1. A state of continuous zig-zag motion
2. A state of non-continuous zig-zag motion
3. A state of non-continuous straight line motion
4. A state of continuous straight line motion

Q. Amongst the following, which solution shows a Tyndall effect?

1. (a) and (d)
2. (c) and (d)
3. (a) and (c)
4. (b) and (d)

Q. List-I and List-II contain four entries each. Entries of List-I are to be matched with some entries of List-II, one or more than one entries of List-I may have the matching with the same entries of List-II
$\begin{array}{cccc}& \text{List-I}& & \text{List-II}\\ \text{(I)}& \text{Peptization}& \text{(P)}& \text{Preparation of sols}\\ \text{(II)}& \text{Ultra centrifugation}& \text{(Q)}& \text{Purification of sols}\\ \text{(III)}& \text{Electrolysis}& \text{(R)}& \text{Preparation of metal sols}\\ \text{(IV)}& \text{Bredig’s are method}& \text{(S)}& \text{Movement of ions across the}\\ & & & \text{membrane in presence of electric field}\end{array}$
Which of the following option has the correct combination considering List-I and List-II?

1. III-S
2. I-Q
3. IV-Q
4. II-R

Q. Tyndall effect is observed only when:
(i) the diameter of the dispersed particles is not much smaller than the wavelength of the light used.
(ii) the refractive indices of dispersed phase and dispersion medium differ greatly in magnitude.
(iii) the size of the particles is generally between ${10}^{-11}$ and ${10}^{-9}$ m in diameter.
(iv) the dispersed phase and dispersion medium can be seen separately in the system.

1. (i) and (iii)
2. (i) and (ii)
3. (i) and (iv)
4. (ii) and (iii)

Q. A true solution does not show Tyndall effect, because of the______.

Q. Which property of colloids is not dependent on the charge of colloidal particles?

Q. How does emulsifying agent stabilized emulsion.

Q. What is Tyndall effect?

Q. Which of the following will show Tyndall effect ?
(I) Salt solution
(II) Milk
(III) Starch solution

1. I, II
2. I, II, III
3. II, III
4. I, III

Q. The protecting power of lyophilic colloidal sol is expressed in terms of

1. Coagulation value
2. Gold number
3. Critical micelle concentration
4. Oxidation number

Q. Why does colloidal particle show Tyndall effect?

Q. ntdefine stefans law and stefan-boltzmann law ?n