WorksheetsOrganic Molecule Indicator Pre-Lab
Total questions: 10
Worksheet time: 6mins
What is a substance that gives a visible sign, usually by a color change, of the presence or absence of a specific molecule or compound?
standard
indicator
catalyst
reactant
product
Which indicator tests can be done with chemicals at room temperature? (mark all that apply)
Benedicts
Biurets
Iodine
Sudan IV
When completing the Benedict's test which safety measures need to be used? (mark all that apply)
Gloves
Goggles
Avoid glass breakage
Avoid burns from a hot water bath
If a student spills Biuret solution on his arm, he should notify the teacher and then rinse his arm off in the sink.
True
False
Which indicator test(s) may have multiple color changes to indicate the amount of a molecule present? (mark all that apply)
Benedicts
Biurets
Iodine
Sudan IV
Which indicator changes from red-orange to blue black in the presence of starch?
Biuret
Benedict
Sudan IV
Iodine
Which indicator changes from blue to violet in the presence of proteins?
Benedict
Biuret
Iodine
Sudan IV
For the brown bag test, a positive translucent spot indicates the presence of ______.
Simple sugars
Complex carbohydrates
Proteins
Lipids
Which color change in Benedict's indicator would indicate the highest concentration of monosaccharides?
blue
yellow
green
brick red
Which sugars would NOT expect a positive color change from Benedict's solution? (mark all that apply)
galactose
sucrose
fructose
cellulose
glucose
