What test can be done to test if a substance is a colloid?

a. place a magnetic or electric field near the substance to check for conductivity

b. add an acid to see if lumps or fluffy masses form

c. measure the temperature of the substance

d. sift the substance through a large holed sieve

a. place a magnetic or electric field near the substance to check for conductivity

Explanation: Colloids are solutions which have particle size  between 1 to 1000 nano meters and they can pass through filter paper but not through animal or vegetable membrane.

The colloids form a stable solution as the particles carry similar charge and they keep repelling each other and do not coagulate.

Thus when an electric or magnetic filed is brought near the colloids, the charged particles of colloid are attracted to the oppositely charged electrode and get precipitated.

They can be coagulated by adding oppositely charged electrolyte.

if the concentration of products is decreased, the equilibrium will shift toward the products). add an inert gas (one that is not involved in the reaction) to the constant-volume reaction mixture: this will increase the total pressure of the system, but will have no effect on the equilibrium condition.

explanation:

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.