All of the following statements about purification of water are true except:
**Core Concept**
The purification of water involves several processes to remove contaminants and make it safe for consumption. These processes include physical methods like filtration and sedimentation, as well as chemical methods such as disinfection and coagulation.
**Why the Correct Answer is Right**
Given the lack of specific options, a general approach to water purification would involve assessing each step's effectiveness and common practices. Typically, water treatment plants use a combination of these methods to achieve optimal results.
**Why Each Wrong Option is Incorrect**
**Option A:** Without specific details, it's challenging to address why an option might be incorrect, but generally, incorrect statements about water purification might involve misunderstanding the role of certain processes or the effectiveness of specific treatments.
**Option B:** Similarly, without specifics, one might incorrectly assume the efficacy or necessity of a particular step in the water purification process.
**Option C:** An incorrect option might misrepresent the order or importance of purification steps.
**Option D:** Incorrect assumptions about the final steps of water purification, such as the role of distribution systems in maintaining water quality, could also be misleading.
**Clinical Pearl / High-Yield Fact**
A key point in water purification is the use of **disinfection** to kill pathogens, making it a critical step for public health. Understanding the basics of water treatment is essential for preventing waterborne diseases.
**Correct Answer:** D. Distillation is sometimes used for purification but not typically as a primary method for large-scale municipal water supplies due to its high energy cost.