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WorksheetsPlant Chromatography
Total questions: 14
Worksheet time: 8mins
Which pigment is not seen in the leaves of trees in the fall in a temperate deciduous biome?
anthocyanin
carotene
xanthophyll
chlorophyll
The pattern of colored pigments on a strip of paper is called?
chromatography
chromatogram
running solvent
solvent front
The process that holds the pigments onto the paper's surface is called?
cohesion
capillarity
absorption
solvenization
The process that draws the pigment up the paper against gravity is called?
solventization
chromatification
capillarity
osmolality
Solvents (alcohol, acetone, and ethers) are considered volatile liquids. Which of the following safety measures are needed when working with volatile chemicals? (mark all that apply)
Wear goggles.
Work in a confined space.
Use only a controlled flame around them.
Avoid inhaling fumes
Place lids on chemical containers when not in use.
When placing the pigment drop on the chromatography paper - be sure to do which of the following? (mark all that apply)
Place the pigment on the tip of the paper.
Apply the pigment with a pipet.
Wait until the drop dries before applying more pigment.
Be sure the pigment is submerged in the solvent when you start.
Which of the following statements are true regarding a mortar and pestle? (mark all that apply)
A mortar is a rounded grinding club
A mortar is a durable bowl.
A pestle is a rounded grinding club
A pestle is a durable bowl.
When sizing the chromatography paper to the lid and jar - what should the paper not touch?
The top of the lid.
The solvent.
The sides of the jar.
The bottom of the jar.
In order to form a pigment extract you will need all of the following except_____.
mortar
pestle
leaf fragments
solvent
tape
When is the chromatogram ready to be removed from the jar?
All the pigments have dissolved.
The solvent front stops moving.
The three different colors appear.
The solvent reaches the pigment dot.
Which value is usually greater?
Distance traveled by pigment.
Distance traveled by solvent.
Distance traveled by the ink line.
The Rf value indicated the _________ at which a pigment moves up the paper compared to the solvent
height
speed
concentration
intensity
Carotene was found to have a Rf value of 0.92. How far did carotene travel?
It stayed by the pigment dot.
It sank into the solvent pool.
It moved almost as far as the solvent front.
It moved almost as far as chlorophyll.
When setting up the chromatography paper, use only pencil and not pen to mark any lines.
True
False
