Question detail

What is a key difference between distillation and reverse osmosis?

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Using the Earth's resources and obtaining potable water

Question

A. Distillation requires heat, while reverse osmosis does not
B. Reverse osmosis is faster than distillation
C. Distillation produces solid waste, while reverse osmosis does not
D. Reverse osmosis can only be used for seawater

Answer

The correct option is Distillation requires heat, while reverse osmosis does not. This answer is correct because it matches the approved learning objective to compare distillation and membrane processes such as reverse osmosis for desalination in the subtopic Potable water.

Explanation

The correct option is Distillation requires heat, while reverse osmosis does not. Distillation requires heat, while reverse osmosis does not is correct because it directly supports the approved learning objective to compare distillation and membrane processes such as reverse osmosis for desalination. 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

Confusing Distillation and Reverse Osmosis

Students often confuse the processes of distillation and reverse osmosis, thinking they are the same method for desalination.

Do not treat this as a general statement about desalination. Instead, answer by clearly linking the correction to compare distillation and membrane processes such as reverse osmosis for desalination in Potable water. This keeps the response inside Using the Earth's resources and obtaining potable water and prevents a vague or off-topic GCSE answer. The mistake to avoid is: students often confuse the processes of distillation and reverse osmosis, thinking they are the same method for desalination.

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