Which of the following will show “tyndall effect”?a. Milk b. Starch solutionc. Copper sulphate solution d. Blood

To determine which of the given options will show the Tyndall effect, we need to understand what the Tyndall effect is. The Tyndall effect is the scattering of light by colloidal particles or suspended particles in a medium. When light passes through a medium, it can either be absorbed or scattered. In the case of the Tyndall effect, the light is scattered by the particles in the medium, making the path of the light visible.

Now, let's analyze each option:

a. Milk: Milk is a colloidal suspension of fat globules and proteins in water. These suspended particles in milk can scatter light, causing the Tyndall effect. Therefore, milk will show the Tyndall effect.

b. Starch solution: Starch is a carbohydrate that dissolves in water to form a colloidal solution. The suspended starch particles in the solution can scatter light, resulting in the Tyndall effect. Therefore, a starch solution will show the Tyndall effect.

c. Copper sulphate solution: Copper sulphate is a soluble salt that forms a true solution in water. True solutions do not exhibit the Tyndall effect because the particles are too small to scatter light. Therefore, a copper sulphate solution will not show the Tyndall effect.

d. Blood: Blood is a complex mixture of cells, proteins, and other substances in a liquid medium. The suspended particles in blood, such as red and white blood cells, can scatter light and produce the Tyndall effect. Therefore, blood will show the Tyndall effect.

In conclusion, the options that will show the Tyndall effect are a. Milk, b. Starch solution, and d. Blood.