Question detail
What is the main reason for treating water before it is released into the environment?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Using the Earth's resources and obtaining potable water
Question
- A. To improve its taste
- B. To remove harmful chemicals and microbes
- C. To increase its temperature
- D. To add nutrients
Answer
The correct option is To remove harmful chemicals and microbes. This answer is correct because it matches the approved learning objective to carry out analysis and purification of water samples from different sources, including pH testing, dissolved solids and distillation. (Required practical 8; AT 2, 3, 4) in the subtopic Potable water.
Explanation
The correct option is To remove harmful chemicals and microbes. To remove harmful chemicals and microbes is correct because it directly supports the approved learning objective to carry out analysis and purification of water samples from different sources, including pH testing, dissolved solids and distillation. (Required practical 8; AT 2, 3, 4). This belongs to the subtopic Potable water within Using the Earth's resources and obtaining potable water, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Potable water.
Common mistake
Common Mistake in Water Purification
Students often confuse the process of distillation with simple filtration, thinking both methods achieve the same result.
Emphasize that distillation involves heating water to create vapor and then cooling it to collect pure water, while filtration simply removes larger particles from the water.
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