Question

please answer fast please fast wrong answers will be reported and correct will be mark as brainlist​

Answer 1

Answer:

(1):. Air in water: Air is also present in water. Aquatic animals breathe the air which remains dissolved in water. When water is boiled, air bubbles can be seen coming up from the bottom of the pan. This simple activity shows that air is present in water.

(2):. temperature

(3):. sorry I didn't now plz don't report ☹️

(4):. Fish breathe underwater using the oxygen that is dissolved in water. But to absorb oxygen from water, fish use special organs called gills. ... When the water moves through the gills, the dissolved oxygen from the water passes through the thin walls of gills and blood vessels, and enters the blood

Answer 2

1) Air is present in water as dissolved state, i.e., air is present in water as dissolved oxygen and CO2 (carbon dioxide) also.

2) The solubility of air depends on : air temperature and air (atmospheric) pressure.

3) Higher the temperature, lower is the solubility of air (gas) in water (liquid).

4) Fishes survive in water by using the dissolved air or oxygen in water for respiration. 1dm³ of water nearly contains 40cm³ of dissolved oxygen.