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Question

The correct order which describes the true solution, colloidal solution and suspension in the order of their increasing stability is


A

Suspension< colloidal solution< true solution

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B

Colloidal solution< true solution< suspension

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C

True solution< colloidal solution< suspension

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D

Colloidal solution< suspension< true solution

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Solution

The correct option is A

Suspension< colloidal solution< true solution


The explanation for the correct option:

(a) Suspension< colloidal solution< true solution:

  1. A suspension is a combination of two or more things that is heterogeneous.
  2. Particles with a diameter larger than 100 nm.
  3. Colloids are mixes of minute distributed insoluble particles of one material floating in another.
  4. A colloid's suspended particles can range in size from 1 to 100 nanometres.
  5. A real solution is a uniform combination with consistent qualities.
  6. The particle size of the dissolved (solute) substance in the solvent is smaller than 10-9 m or 1 nm.
  7. Thus the size of the particles increases as true solution< colloidal solution< suspension.
  8. The stability of the solution is inversely proportional to the size of the solute particles.
  9. Therefore, the correct increase order of stability is suspension< colloidal solution< true solution.

The explanation for the incorrect options:

Since, the correct order in increasing the stability is suspension< colloidal solution< true solution thus options (b), (c) and (d) are incorrect.

Hence, option (a) is the correct option.


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