Chemical Changes Quiz

What is conserved in a chemical change?

• Energy

• Mass

• Volume

• Temperature

What is the general equation for the reaction of metals with oxygen?

• Metal + water à Metal hydroxide

• Metal + acid à Salt + hydrogen

• Metal + oxygen à Metal oxide

• Metal + base à Salt + water

What is reduction?

• Gain of oxygen

• Loss of oxygen

• Gain of hydrogen

• Loss of hydrogen

What do exothermic reactions do?

• Absorb energy

• Release energy

• Create energy

• Destroy energy

What do acids produce when they react with metals?

• Metal oxides

• Salts and hydrogen

• Water and salt

• Metal hydroxides

What is an example of a reaction between copper and hydrochloric acid?

• Copper + Hydrochloric acid à Copper oxide + water

• Copper + Hydrochloric acid à Copper chloride + hydrogen

• Copper + Hydrochloric acid à Copper sulfate + oxygen

• Copper + Hydrochloric acid à Copper nitrate + nitrogen

What is a chemical change also called?

• Physical reaction

• Chemical reaction

• Physical change

• Energy change

What is produced when acids are neutralised by alkalis?

• Salts and water

• Hydrogen and oxygen

• Carbon dioxide and water

• Nitrates and sulfates

Which acid produces chloride salts?

• Hydrochloric Acid

• Sulfuric Acid

• Nitric Acid

• Acetic Acid

What is the test for hydrogen gas?

• Burning splint test

• Limewater test

• Litmus paper test

• Glowing splint test