Separation and Purification Techniques Revision

What is the reading of the meniscus?

• 36 cm³

• 45 cm³

• 35.0 cm³

• 30.5 cm³

Refer to the image

• A

• B

• C

• D

Refer to the image

• A

• B

• C

• D

• A

• B

• C

• D

Which apparatus is used to measure volume of solutions accurately?

• Burette

• Measuring Cylinder

• Beaker

• Conical Flask

What is the best way of testing a solid to find out if it is pure?

• examine its colour

• measure its density

• measure its melting point

• find out if it dissolves in water

The apparatus that is most suitable for holding 30 cm³ water for heating is

• measuring cylinder

• beaker

• test tube

• boiling tube

Refer to the image

• A

• B

• C

• D

Tags

NGSS.HS-PS3-4

Refer to the image

• 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.

Refer to the image.

• 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.

Tags

NGSS.HS-PS3-4