[amp_mcq option1=”Biological activity of bacteria in sewage” option2=”Solubility of gases in sewage” option3=”Viscosity of sewage” option4=”All the above” correct=”option4″]
The correct answer is: D. All the above
The temperature affects the biological activity of bacteria in sewage, the solubility of gases in sewage, and the viscosity of sewage.
- Biological activity of bacteria in sewage: Bacteria are responsible for breaking down organic matter in sewage. The rate of bacterial activity increases with temperature. This is because higher temperatures increase the rate of chemical reactions. As a result, sewage treatment plants operate at higher temperatures to increase the rate of sewage treatment.
- Solubility of gases in sewage: The solubility of gases in liquids decreases with increasing temperature. This is because higher temperatures increase the kinetic energy of molecules. As a result, gas molecules are more likely to escape from the liquid. This is why carbonated beverages go flat when they are left out in the open.
- Viscosity of sewage: The viscosity of a liquid is a measure of its resistance to flow. The viscosity of sewage increases with increasing temperature. This is because higher temperatures increase the kinetic energy of molecules. As a result, molecules are more likely to move around and collide with each other. This increases the friction between the molecules and makes the liquid more viscous.