Question

Select the colloidal solution from: Soap+water,
salt+water, sand+water;fog.​

Answer 1

Answer:

Soaps make maximum foam in soft water.

Rain water is soft because it doesnot contain dissolved salts of calcium and magnesium. Whereas river water, well water and salt water are hard due to presence of dissolved salts.

So, soap will form maximum foam with rain water.

Answer 2

Explanation:

Whereas river water, well water and salt water are hard due to presence of dissolved salts. So, soap will form maximum foam with rain water. The colloidal solution from the given options is soap + water. Colloidal solutions are the mixtures where the elements are regularly suspended in a fluid.