Question

2. Which one of the following is not an example of a pure substance? oxygen air copper carbon dioxide 3. The process of loading helps to- slow down the rate of sedimentation speed up the rate of sedimentation speed up the rate of decantation slow down the rate of decantation 4. Transferring the clear liquid, into another container, leaving behind the residue, is called .... a )decantation b )sedimentation c )crystallisation d )condensation .. 5 )A substance, that sublimes easily, is- ... a )salt b )naphthalene c )chalk d )sugar​

Answer 1

Answer:

2.carbondioxide

3. speed up the sedimentation rate

4. sedimentation

5. naphthalene.

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Answer 2

Answer:

don't know the answer sorry