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In this question, the correct answer is B. Fresh sewage is neutral in nature. Here's why:
1. Fresh sewage is a mixture of organic and inorganic materials that are released from homes, businesses, and industries. When sewage is first produced and hasn't undergone any treatment processes, it is considered fresh sewage.
2. The pH scale measures the acidity or alkalinity of a substance, with 7 being neutral. Fresh sewage typically falls around the neutral pH of 7.
3. As sewage undergoes decomposition and bacterial activity, its pH can change. Over time, sewage can become more acidic or alkaline due to the breakdown of organic matter by bacteria, leading to changes in the pH level.
In summary, fresh sewage is initially neutral in nature, but its pH can shift as it undergoes decomposition processes.
