Which of the following are not compounds?
Question:

Which of the following are not compounds?

1. Chlorine gas

2. Potassium chloride

3. Iron

4. Iron sulphide

5. Aluminium

6. lodine

7. Carbon

8. Carbon monoxide

9. Sulphur powder.

Solution:

Iron, aluminium, carbon and sulphur powder are not compounds. These are elements.

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