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29 December, 23:37

Which is an example of a colloid?

a) a mixture that settles out

b) a mixture that is separated by filtration

c) a mixture that scatters light

d) a salt and water mixture

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Answers (2)
  1. 29 December, 23:52
    0
    A mixture that scatters light is colloid

    Explanation:

    There are three categories of defining dissolution of a solute in a solvent:

    a) true solution: where particle size is less than 1 nm

    b) colloidal solutions: Where particles size is in between 1 - 1000 nm

    c) suspension : where particle size is more than 1000 nm.

    True solutions are homogeneous mixtures while colloids and suspensions are heterogeneous.

    The mixture that settles out on standing is suspension. Example : sand in water.

    A mixture that separated by filtration (normal filter paper) is again a suspension.

    A mixture that scatters light is colloid. Colloids show tyndall effect.

    A salt and water mixture is a true solution, which cannot be separated by filter paper or semi permeable membrane even.
  2. 30 December, 00:00
    0
    the answer is c) a mixture that scatters light.
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