Experimental Techniques Quiz

• A

• B

• C

• D

• This makes it impossible to calculate Rf values.

• This makes it impossible to use a locating agent.

• This results in a safety hazard caused by solvent fumes.

• This causes the spot nearest the bottom of the paper to catch up with the spot above it.

• A

• B

• C

• D

• Ethanol has a higher boiling point than water.

• Ethanol has a lower melting point than water.

• Ethanol has a higher melting point than water.

• Ethanol has a lower boiling point than water.

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

A Solution consisting of a Soluble Solid and a particular Solvent can be separated by:

• Simple Distillation.

• Fractional Distillation.

• Evaporation.

• Centrifuging.

Mixtures are different than pure substances because mixtures-

• have lower boiling points

• can be separated physically

• are less dense than pure substances

• contain only one type of atom

Answer the question

• D

• B

• A

• C