Nat 4 Chemistry- Unit 2- Consumer Products

Carbohydrates contain which elements? Choose all that apply

• Carbon

• Hydrogen

• Nitrogen

• Oxygen

Glucose is a type of carbohydrate. True or False?

• True

• False

Iodine can be used to test for starch. Which of the below statements is true.

• In the presence of starch iodine solution will turn from orange to colourless.

• In the presence of starch iodine will turn from blue/black to orange.

• In the presence of starch iodine will from colourless to blue/black.

• In the presence of starch iodine will turn from orange to blue/black.

During digestion, starch is broken down into glucose. Why does this happen?

• Because of photosynthesis

• Because starch is insoluble

• Because our stomachs prefer sugars to starch

• Because starch molecules are too big to fit through the gut wall

Is starch soluble?

• Yes

• No

Is glucose soluble?

• Yes

• No

Which test can be used to detect glucose?

• Iodine solution

• Bromine solution

• Benedict's Reagent

In the presence of glucose, Benedict's Reagent changes colour from:

• Blue to orange/brick-red

• Colourless to orange/brick-red

• Orange/brick-red to colourless

• Orange/brick-red to blue

Can glucose be detected with iodine solution?

• Yes

• No

What is the name of the process in which glucose is converted into alcohol and carbon dioxide?

• Distillation

• Evaporation

• Fermentation

• Filtration