Question

Which one of the following is not an example of a pure substance? *

Oxygen

Copper

Air

Carbon dioxide

Which one of the following is not an example of a pure substance? *

Oxygen

Copper

Air

Common salt is prepared on a large scale through the process of....... *

Evaporation

Condensation

Sublimation

Centrifugation



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Answer 1

Answer:

gud morning dear

Explanation:

1. oxygen
2. evaporation

Answer 2

Answer:

1st CO2

2nd Air

3rd Evaporation