Look the middle image. is it pure or impure?

• pure

• impure

Look at the right image. Is it a a pure or impure substance?

• pure

• impure

Why must the start line be drawn in pencil?

• pencil does not dissolve in to the water

• pencil dissolves in to the water

• pencil will separate out

What is the test for oxygen?

• turns limewater cloudy

• relights a glowing splint

• bleaches damp litmus paper white

• makes a squeaky pop

What is the test for carbon dioxide?

• turns limewater cloudy

• relights a glowing splint

• bleaches damp litmus paper white

• makes a squeaky pop

What is the test for chlorine?

• turns limewater cloudy

• relights a glowing splint

• bleaches damp litmus paper white

• makes a squeaky pop

What is the test for hydrogen?

• turns limewater cloudy

• relights a glowing splint

• bleaches damp litmus paper white

• makes a squeaky pop

What is the stationary phase?

• paper

• water

• ink

• beaker

What is the mobile phase?

• paper

• beaker

• ink

• water

What is a formulation?

• A simple mixture designed as an useless product

• A complex mixture designed as a useful product

• A simple mixture