1.6 Portable Water From Freshwater (GCSE Chemistry)

The following is a GCSE Chemistry test covering '1.6 Portable Water From Freshwater'

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Desalination uses what main process to remove salts?

Which process is employed by countries having coastlines but limited freshwater sources?

What is the main disadvantage of desalination processes?

Rainwater normally contains:

What is potable water?

What causes rainwater to be slightly acidic?

To remove dissolved substances during reverse osmosis, pressure applied must overcome:

After initial filtration, the next step commonly is:

What is the first stage in making freshwater potable?

Which one is commonly used to sterilise drinking water besides chlorine?

What role does sterilisation play in making water potable?

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