Q1: The pH value of fresh sewage is usually

ANS:B - more than 7

The pH value of fresh sewage is not usually more than 7. In fact, it is typically less than 7, making it acidic due to the presence of organic acids and other acidic compounds. When sewage undergoes decomposition and biological processes, it tends to produce acidic byproducts, contributing to the overall acidity of the wastewater. These byproducts include organic acids generated from the breakdown of organic matter. Therefore, it is incorrect to state that the pH value of fresh sewage is more than 7. The typical pH range for fresh sewage is usually below 7, indicating its acidic nature.