Food tests

• Science
• Lower Secondary (Key Stage 3)

Food tests

What is iodine used to test for?

1. Fibres
2. Proteins
3. Starch
4. Lipids

Which colour will iodine turn if starch is present in the food sample?

1. Brick red
2. Blue-black
3. Purple
4. Cloudy white

Which reagent is used to test for starch?

1. Benedict reagent
2. Biuret reagent
3. Iodine solution
4. Ethanol

What would be the negative result of iodine test?

1. Purple
2. Blue-black
3. Cloudy white
4. orangy/brown

Which type of nutrient is starch?

1. Protein
2. Lipids
3. Fibre
4. Carbohydrates

What colour would it turn if lots of sugar is present?

1. Green
2. Blue
3. Orange
4. Brick red

What chemical is used to test for sugars?

1. Iodine
2. Biuret
3. Benedict
4. Ethanol

What would be the negative result if no sugar is present in the food sample?

1. Brick red
2. orange
3. Blue
4. Green

What reagent/chemical is used to test for protein?

1. Benedict
2. Biuret
3. Iodine
4. Ethanol

What colour would it turn if protein is present?

1. Brick red
2. Purple
3. Blue-black
4. Cloudy White

What colour would it be if no protein is present?

1. Blue
2. Green
3. Brick red
4. Cloudy white