Tyndall Effect

Q.

The Tyndall effect is not observed in :

1. emulsions
2. colloidal solution
3. suspension
4. true solution

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.

The Tyndall effect is not observed in :

1. suspension

2. colloidal solution

3. emulsions

4. true solution

Q.

The Tyndall effect is observed only when following conditions are satisfied:-

(a) The diameter of the dispersed particles is much smaller than the wavelength of the light used.
(b) The diameter of the dispersed particle is not much smaller than the wavelength of the light used.
(c) The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude.
(d) The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.

1. (a) and (d)

2. (b) and (d)

3. (a) and (c)

4. (b) and (c)

Q. In which of the following tyndall effect is not observed?

1. Emulsions
2. Sugar solution
3. Gold sol
4. Suspensions

Q.

Tyndall effect would be observed in a

[CPMT 1973, 79, 90, 91, 94; MP PET 1999;

MP PMT 1973, 89; DPMT 1982, 83; AFMC 1999]

1. Solution

2. Colloidal solution

3. Precipitate

4. Solvent

Q.

Sky looks blue due to [MNR 1986; MP PET 1992]

1. Reflection

2. Transmission

3. Scattering

4. Dispersion effect

Q. Which of the following is true according to the definition of Tyndall effect?

1. In a light source containing many wavelengths, the smaller wavelengths are relatively scattered more
2. In a light source containing many wavelengths, the larger wavelengths are relatively scattered more
3. All the wavelengths are scattered equally
4. In a light source containing many wavelengths, the wavelengths wavelengths in the middle are relatively scattered more

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

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

Q.

The scattering of light by the dispersed phase is called

1. Brownian movement

2. adsorption

3. Tyndall effect

4. electrophoresis