AQA GCSE CHEMISTRY - CHEMICAL CHANGES

When a metal is reduced by reaction with carbon, which element is removed from the compound?

• Carbon

• Oxygen

• Hydrogen

• Silver

What type of compound can undergo electrolysis?

• Metallic

• Giant covalent

• Simple covalent

• Ionic

Which electrode do the negatively charged ions move to?

• Left

• Cathode

• Anode

• Right

When you electrolyse a molten ionic compound, the product at the cathode is…

• a metal

• a non-metal

• a mixture

• a compound

What test and result shows that hydrogen has been produced?

• Limewater turns cloudy

• A glowing splint relights

• It burns with a squeaky pop

• Damp blue litmus paper turns red

When an electric current is passed through an electrolyte, the ions move to…

• the magnets

• the poles

• the electrodes

• the pipettes

What is made when an acid reacts with a base?

• A salt and water only

• A salt and carbon dioxide only

• A salt and hydrogen only

• A salt, hydrogen and carbon dioxide

Oxidation is the… (Higher Tier Question)

• loss of electrons

• gain of electrons

• loss of protons

• gain of protons

Most metals are found in the earth as…

• elements

• mixtures

• compounds

• atoms

What is an alkali?

• An alkali is an acid by another name

• An alkali is a base that is soluble in water

• An alkali is a type of rock

• An alkali is a base that is not soluble in water