Chemistry of food and food tests

Which of the following tests for starch?

• Iodine

• Benedicts

• Biuret

• Ethanol

Which of the following tests for protein?

• Iodine

• Benedicts

• Biuret

• Ethanol

Which of the following tests for glucose?

• Iodine

• Benedicts

• Biuret

• Ethanol

When starch is present iodine solution turns...

• purple

• blue-black

• orange

• milky

When small amounts of glucose is present Benedicts solution turns...

• purple

• blue-black

• orange

• green

When large amounts of glucose is present Benedicts solution turns...

• purple

• blue-black

• brick-red

• green

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

• red-brown

• blue

• black

• colourless

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

• brick red

• blue

• black

• yellow

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

• brick red

• blue

• black

• yellow

Which test requires heat?

• Benedicts

• Biuret

• Iodine

• Ethanol