do these questions below written on sheet.
Answers
Answer & Explanation:
1. True Solutions are the solution which have a uniform mixture throughout. The solute in this type of solutions are so finely dissolved in the solvent that they are even cannot be seen under a microscope. The solute can easily pass through a filter paper. The solute have a of 1 -10 micrometre or can be less.
Colloidal solutions are the solution which do have a uniform mixture throughout but the solute can be seen under microscope and are not as finely dissolved as the true solutions. The solute have a size of 1-100 micrometre and can be seen by Tyndall effect (they scatter when light passes through them).
2. Smoke: Carbon is the dispersion phase and gas is the dispersion medium (oxygen).
Fog: Gas is the dispersion phase and liquid is the dispersion medium.
Cloud: Liquid is the dispersion phase and gas is the dispersion medium.
3. Colloidal particles appear to be homogeneous as their solutes cannot be seen under our naked eyes. But they do not reach the criteria of homogeneous mixture as they are not dissolved like true solutions and also, they can be seen under microscope. Lastly, they can be scattered by Tyndall effect.
4. Well,
Among all those 4 options, the fog is a colloid and also the soap solution gives rise to foam which is also a colloid.
Hope this helps.