Filtration is an example of a process that can be used to separate , but not . A) water; gas B) mixtures; pure substances C) pure substances; mixtures D) homogeneous mixtures; heterogeneous mixtures

The correct answer is

B) mixtures; pure substances

Explanation:

Filtration is a process that can be applied to solids or other larger size particles suspended in a mixture containing one or particles of different sizes such as solids in liquids or gas such that the liquid is meant to pass through the tiny holes on the filtering medium or mesh. The liquid that passes through the filtering medium is known as the filtrate

As such filtration can only be used to separate  particles of  mixtures containing particles of different sizes but it cannot be used to separate particles of a pure substance which has particles of only one size

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.