Unit 8 Revision

Which gas is produced in the reaction between metal and acid?

• hydrogen

• oxygen

• carbon dioxide

• nitrogen

Which is a positive test for the presence of oxygen?

• relighting a glowing splint

• popping sound

• turning solution milky

Which is a positive test for hydrogen?

• popping sound

• relighting a glowing splint

• turning solution milky

Which is a positive test for carbon dioxide?

• turning solution milky

• popping sound

• relighting a glowing splint

zinc reacts with hydrochloric acid to produce

• hydrogen and zinc chloride

• water and zinc chloride

• carbon dioxide and zinc chloride

potassium hydroxide and _________ produces potassium sulfate and water

• sulfuric acid

• hydrochloric acid

• salicylic acid

• nitric acid

Which is an example of a chemical change?

• burning paper

• melting ice

• cutting paper

• boiling water

What will be the product between acid and base?

• water and salt

• water and sugar

• sugar and salt