Question

The importance of dissolved gases and solids in water are:
A) They provide essential minerals for living bodies for their growth and development
B) The dissolved \[C{O_2}\] is used for photosynthesis in aquatic plants.
C) The dissolved oxygen is used for respiration in aquatic plants, animals.
D) All of the above

Answer 1

Hint: Dissolved gas and solids in water are highly important and they are of multiple uses. Natural and drinking water are in equilibrium with the air, and so will contain dissolved gases such as nitrogen, oxygen and carbon dioxide. In purified water, carbon dioxide dissociates to form a weak carbonic acid which reduces the capacity of anion exchange resins.

Complete step by step answer:
-The most common examples of dissolving involve a solid and a liquid, usually water. When a solid dissolves the solid (solute) and the liquid (solvent) form a very close intimate mixture called a solution.
-The use and creation of dissolved gases by living things can override the effect of these properties. For example, warm water with lots of plankton in it can hold more carbon dioxide than cold water with few living things in it.
-Solution dissolved gases and solids in water provide minerals for living bodies for their growth and development.
-The dissolved \[C{O_2}\] is used for photosynthesis, in aquatic plants.
-The dissolved oxygen is used for respiration in aquatic plants and animals.

So, option (D) is correct.

Note:
For this question, we need to know the properties of gases and solids. Dissolved oxygen and carbon dioxide are vital for marine life. Marine plants use dissolved carbon dioxide, sunlight and water to make carbohydrates through the process of photosynthesis. This process releases oxygen into the water.