Colour of Colloids

Q. The colour of milk is white because

1. None of the above
2. Both the dispersed phase and the dispersion medium are colourless but the dispersed fat globules scatter all wavelengths equally
3. Both the dispersed phase and the dispersion medium are white and the dispersed fat globules scatter all wavelengths equally
4. The dispersed phase and the dispersion medium are made up of complement colours

Q. Which of the following are true with respect to the colour of a colloid?

1. The colour depends on the wavelength of the light
2. The colour depends on both the size and nature of the dispersed particles
3. In a light source containing many different wavelengths, a colloid scatters lower wavelengths to a much greater extent than the higher wavelengths
4. The colour of a colloid depends on the manner in which the observer receives light. When viewed under transmitted light, it could appear one way and when viewed under reflected light, the colloid could appear in a different colour

Q. The colloidal particles can pass through

1. Filter paper as well as animal membrane
2. Animal membrane but not through filter paper
3. Filter paper but not through animal membrane
4. Semipermeable membrane

Q. Which reaction gives colloidal solution?

1. $2Cu+{Cl}_2\to {Cu}_2{Cl}_2$
2. $2H{NO}_3+3H_{2}S\to 3S+4H_{2}O+2NO$
3. $2Mg+{CO}_2\to 2MgO+C$
4. $2Cu+O_2\to 2CuO$

Q. Colloidal particle can be seen by?

1. Naked eye
2. Ultramicroscope
3. Microscope
4. Telescope

Q. The diameter of colloidal particles range from :

1. ${10}^{-6}m$ to ${10}^{-9}m$
2. ${10}^{-9}m$ to ${10}^{-12}m$
3. ${10}^{-3}m$ to ${10}^{-6}m$
4. ${10}^{3}m$ to ${10}^{-3}m$

Q. Which of the followings are not natural colloid?

1. $NaCl$
2. Blood
3. $RCOONa$
4. Sugar

Q. Radha prepared a solution which could be separated by filtration.
i) Name the type of solution.
ii) Is the solution transparent or opaque?
iii) Mention the nature of the solution.
iv) Mention the size of the solute particle

Q. Which of the following is true for colloidal solution?

1. Heterogeneous
2. Settles by just gravity
3. Diffuses slowly through animal membrane
4. Does not show Tyndall effect

Q. ______ is not an example of Aerosol.

1. Fog
2. Clouds
3. Mist
4. Shaving cream