[amp_mcq option1=”Acidic and alkaline” option2=”Alkaline and acidic” option3=”Both acidic” option4=”Both alkaline” correct=”option1″]
The correct answer is A. Acidic and alkaline.
Fresh sewage is acidic because it contains a high concentration of organic matter, such as food waste and human waste. This organic matter is broken down by bacteria, which produce acids as a byproduct. Septic sewage is alkaline because it contains a high concentration of ammonia, which is a base. Ammonia is produced when bacteria break down urea, which is a waste product of protein metabolism.
Here is a brief explanation of each option:
- Option A: Acidic and alkaline. This is the correct answer. Fresh sewage is acidic because it contains a high concentration of organic matter, such as food waste and human waste. This organic matter is broken down by bacteria, which produce acids as a byproduct. Septic sewage is alkaline because it contains a high concentration of ammonia, which is a base. Ammonia is produced when bacteria break down urea, which is a waste product of protein metabolism.
- Option B: Alkaline and acidic. This is not the correct answer. Fresh sewage is acidic, while septic sewage is alkaline.
- Option C: Both acidic. This is not the correct answer. Fresh sewage is acidic, while septic sewage is alkaline.
- Option D: Both alkaline. This is not the correct answer. Fresh sewage is acidic, while septic sewage is alkaline.