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Worksheets

FOOD TEST

Total questions: 23

Worksheet time: 12mins

Name
Class
Date
1.

I am used to test for the presence of complex carbohydrates (starch)

a)

Benedict's Test

b)

Biuret Test

c)

Iodine Test

d)

Ethanol Emulsion Test

2.

I am used to test for the presence of simple carbohydrates (sugars)

a)

Benedict's Test

b)

Biuret Test

c)

Iodine Test

d)

Ethanol Emulsion Test

3.

I am used to test for the presence of protein

a)

Benedict's Test

b)

Biuret Test

c)

Iodine Test

d)

Ethanol Emulsion Test

4.

I am used to test for the presence of lipids (fats)

a)

Benedict's Test

b)

Biuret Test

c)

Iodine Test

d)

Ethanol Emulsion Test

5.

If I am positive, I will turn brick-red

a)

Benedict's Test

b)

Biuret Test

c)

Iodine Test

d)

Ethanol Emulsion Test

6.

If I am positive, I will turn dark blue/black

a)

Benedict's Test

b)

Biuret Test

c)

Iodine Test

d)

Ethanol Emulsion Test

7.

If I am positive, I will turn purple (violet)

a)

Benedict's Test

b)

Biuret Test

c)

Iodine Test

d)

Ethanol Emulsion Test

8.

In this experiment, you must put your test tubes into a hot water bath

a)

Benedict's Test

b)

Biuret Test

c)

Iodine Test

d)

Ethanol Emulsion Test

9.

This solution is changed into dark blue when mixed up with the food. Name the solution and the food. (select multiple options)

a)

Starch

b)

Iodine

c)

Protein

d)

Millon's reagent

e)

Benedict

10.

Name the food test and the type of food that was being tested. (select multiple options)

a)

Benedict's test

b)

Glucose

c)

Millon's test

d)

Protein

e)

Iodine test

11.

Identify a mistake of this test.

a)

The test tube is not in a water bath

b)

Blue flame is used

c)

Only a few drops of Benedict's reagent is used

12.

This is emulsion test. Select the names ALL the mixtures used. (You can select more than one options)

a)

Water

b)

Ethanol

c)

Oil

d)

Millon's reagent

e)

Filter paper

13.

Name the test to identify the presence of fat in food.

a)

spot test

b)

Filter paper test

c)

Iodine test

d)

Benedict's test

14.

The grease spot that is formed on the paper is ....................

a)

transparent

b)

translucent

c)

transgender

d)

translocation

15.

A negative test for starch will cause Iodine to stay...

a)

orange/red/brown

b)

blue

c)

black

d)

blue-black

16.

A negative test for protein will cause Biuret to stay...

a)

brick red

b)

blue

c)

black

d)

orange

17.

A negative test for glucose will cause Benedicts to stay...

a)

brick red

b)

blue

c)

black

d)

orange

18.

Which chemicals did you mix to test for proteins - biuret test?

a)

Ethanol and water

b)

Iodine and potassium permanganate

c)

Benedicts Solution

d)

Sodium Hydroxide and Copper Sulphate

19.

How do you test for lipids (emulsion test)?

a)

By using Ethanol and water

b)

By using Benedicts solution

c)

By using Iodine

d)

By using Biuret test

20.

What is a positive result for the lipid emulsion test?

a)

milky white colour

b)

clear

c)

yellow

d)

green

21.

The building blocks of proteins are

a)

carbohydrates

b)

amino acids

c)

sugars

d)

fatty acids

22.

The building blocks of starch are

a)

glycerol

b)

amino acids

c)

glucose

d)

fatty acids

23.

The building blocks of lipids are

a)

Starches

b)

Fatty acids and Glycerol

c)

Sugars

d)

Amino Acids