PDF chapter test TRY NOW

8. Hardness of water: think and select the answer

1.

Take a look at the image above and choose the correct answer.

B is rain water and A is ground water
B is distilled water and A is rain water
B is sea water and A is distilled water
B is distilled water and A is sea water

2.

Instead of lather, detergents create a thick scum with this water. As a result, dirt cleaning becomes much more difficult. This water is

river water
distilled water
rain water
All of these
None of these

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