Chemical Changes Revision Quiz

What is the gas produced from an acid + metal reaction?

• water vapour

• carbon dioxide gas (CO₂)

• hydrogen gas (H₂)

• oxygen gas (O₂)

Answer explanation

Acid metal reactions produce a soluble salt and hydrogen gas.

What are the products formed from the acid + carbonate reaction?

• hydrogen gas (H₂), salt

• water (H₂O), carbon dioxide (CO₂), salt

• water (H₂O), salt

Answer explanation

Carbonates produce carbon dioxide as well as a salt and water.

Acid + Metal --> ?

• Salt + Water

• Salt + Hydrogen

• Salt

• Hydrogen

Answer explanation

Acids and metals produce a soluble salt and hydrogen gas.

What gas is produced when a metal reacts with an acid?

• Water vapour

• Acidic gas

• Hydrogen

• Nitrogen

Answer explanation

Acids and metals produce a soluble salt and hydrogen gas.

An acid reacts with a metal carbonate to produce 

• Salt, water and hydrogen gas

• Salt, water and carbon dioxide

• Limewater

• Salt and water 

Answer explanation

Carbonates produce carbon dioxide as well as a salt and water.

A neutralisation reaction produces 

• An acid 

• A neutral substance 

• Only water 

• Salt and water 

Answer explanation

When an acid and a base (a metal oxide, metal carbonate or metal hydroxide) react, they produce a soluble salt and water.

A neutralisation reaction is a reaction between 

• Acid and a Base 

• Acid and water 

• Base and water 

• None of the above 

Answer explanation

Bases include metal oxides, metal hydroxides and metal carbonates. Some are soluble, and called alkalis, while some are insoluble, like metal oxides and metal carbonates.

hydrochloric acid + zinc carbonate --> ?

• zinc chloride + carbon dioxide gas + water

• zinc chloride + water

• zinc chloride + hydrogen gas

Answer explanation

Metal carbonates produce a salt, water and carbon dioxide when reacting with acids. The salt is named by looking at the metal in the base and the acid. If the acid is nitric acid then the salt will be a metal nitrate.

sulfuric acid + sodium hydroxide --> ?

• sodium sulfate + carbon dioxide gas + water

• sodium sulfate + water

• sodium sulfate + hydrogen gas

Answer explanation

Metal hydroxides produce a salt and water when reacting with an acid. The salt is named by looking at the metal in the base and the acid. If the acid is sulphuric acid then the salt will be a metal sulphate.

nitric acid + magnesium --> ?

• magnesium nitrate + carbon dioxide gas + water

• magnesium nitrate + water

• magnesium nitrate + hydrogen gas

Answer explanation

Metals produce a salt and hydrogen when reacting with acids. The salt is named by looking at the metal in the base and the acid. If the acid is nitric acid then the salt will be a metal nitrate.