Which of the following is an example of inorganic matter found in water?

Inorganic matter refers to substances that are not derived from living organisms and do not contain carbon-hydrogen (C-H) bonds. Sand is composed primarily of silica (silicon dioxide) and is a mineral, making it a classic example of inorganic material. It plays a significant role in various water treatment processes, particularly in filtration systems, where it helps to remove particulates and contaminants from water.

Vegetation, bacteria, and algae are all organic matters. Vegetation consists of living plants, bacteria are living microorganisms, and algae are also photosynthetic organisms that are part of the biological components in aquatic ecosystems. Understanding the distinction between organic and inorganic matter is essential for water operators, as it affects water quality, treatment processes, and environmental regulations.