Chromatography and Fractional Distillation

The chromatogram shows that the -------------- spot is a mixture.

• red

• orange

• green

• black

The diagram below shows a chromatogram obtained when a sample X was analysed together with four other known dyes P, Q, R and S. Dye Q was known to cause cancer. Which of the following dye(s) is/are safe for use?

• P only

• S only

• P and S

• P and X

Tags

NGSS.HS-ETS1-3

NGSS.HS-PS1-2

A substance is soluble if it can be dissolved.

In paper chromatography, the most soluble solute _____________________ .

• does not move from the start point

• stays closest to the start point

• travels furthest away from the start point

• can be found in the middle of the chromatogram

The R_f value  for the blue component is 

• 0.3
• 0.7
• 10
• 3

The R_f value  for the red component is 

• 0.3
• 0.7
• 10
• 7

A separation technique which uses a fractionating column to separate different liquid components in a mixture with different boiling points by heating mixture is called

• Fractional distillation
• filtration
• crystallization
• evaporation

Which letter in the diagram of Industrial Crude Oil Fractions identifies 'Petroleum Gas'?

• A
• B
• C
• D

Which letter in the diagram of Industrial Crude Oil Fractions identifies 'Diesel'?

• B
• D
• G
• H

Which letter in the diagram of Industrial Crude Oil Fractions identifies 'Bitumen'?

• B
• D
• G
• H

How does the temperature change from top to bottom?

• Increases
• Decreases
• It does not change
• Cannot be determined

Tags

NGSS.HS-ESS2-3

NGSS.HS-PS3-2

NGSS.HS-PS3-4