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Worksheets3E Food Tests
Total questions: 15
Worksheet time: 8mins
Which of the following tests for starch?
Iodine test
Benedict's test
Biuret test
Ethanol emulsion test
Which of the following tests for protein?
Iodine test
Benedict's test
Biuret test
Ethanol emulsion test
Which of the following tests for reducing sugars?
Iodine test
Benedict's test
Biuret test
Ethanol emulsion test
Which of the following tests for lipids?
Ethanol emulsion test
Iodine test
Benedict's test
Biuret test
When starch is present, iodine solution turns _______________.
yellow-brown
blue-black
purple
brick-red
When glucose is present, iodine solution turns _______________.
yellow-brown
blue-black
purple
brick-red
When large amounts of glucose is present, Benedict's solution turns _____________.
blue
yellow
brick-red
green
When protein is present, biuret solution turns ______________.
purple
blue-black
blue
brick-red
What do you observe when the biuret test is carried out with amino acids?
brick-red solution forms
blue solution forms
blue-black solution forms
yellow-brown solution forms
If there are no reducing sugars, the Benedict's solution remains___________.
brick-red
blue
green
orange
When ethanol and water is added to fats, what is observed?
cloudy white emulsion
clear solution
blue solution
purple emulsion
This photo shows a _____________.
negative test for reducing sugar
negative test for starch
positive test for starch
positive test for reducing sugar
The test tubes in the photo represent a negative and positive result for _______.
Benedict's test with glucose
Biuret test with protein
Iodine test with starch
Ethanol emulsion test with fat
Which molecule will turn iodine solution blue-black?
starch
cellulose
glycogen
glucose
Which chemicals did you mix to test for proteins?
ethanol and water
iodine and water
sodium carbonate and copper(II) sulfate
sodium hydroxide and copper(II) sulfate
