Food Tests

Question 1

Test for glucose?

Answer 1

Benedict’s solution

Question 2

Test for starch?

Answer 2

Iodine solution

Question 3

Test for proteins?

Answer 3

Biuret Solution

Question 4

Test for lipids

Answer 4

Using ethanol

Question 5

Steps for test for glucose (benedict’s solution)

Answer 5

Add benedict’s solution
Heat and observe colour change
Blue —> brick red

Question 6

Steps for test for starch (using iodine)

Answer 6

Add drops of iodine solution to food sample
Observe colour change
Orange-brown —-> blue-black

Question 7

Steps for protein test (use biuret solution)

Answer 7

Add drops of biuret solution to food sample
Observe colour change
Blue —-> purple/pink zesty ahh

Question 8

Steps for lipids test (using ethanol)

Answer 8

Mix food sample with ethanol
Cloudy emulsion forms = positive
Colourless = negative

Question 9

Iodine colour change

Answer 9

Orange-brown —-> blue black

Question 10

Benedicts solution colour change

Answer 10

Light blue —-> brick red

Question 11

Ethanol colour change

Answer 11

Colourless —-> cloudy emulsion

Question 12

Biuret test colour change

Answer 12

Blue —> lilac purple ZESTY AHH