Chemical Reactions

Select the example of a chemical reaction

• Mixing milk in coffee

• Boiling water

• Burning food

• Melting ice

Select the example of a physical change.

• Corroding something with acid

• Boiling water

• Burning food

• Digestion

Select the correct ending.

In a chemical reaction...

• The substances can be returned to normal.

• Substances stay the same.

• New substances are made.

• there is always a colour change.

Select the correct ending.

Chemical reactions are ...

• always warm.

• always smelly.

• reversible

• irreversible

Select the sign of a chemical reaction.

• Colour change

• Change of state

• Flames

• Change of shape

Select another sign of a chemical reaction.

• Change in volume

• Bangs or fizzes

• Melting

• Freezing

Select the correct meaning of 'product' in a chemical reaction.

• Something you designed.

• Soemthing to buy or sell.

• The things which react together.

• The new things made in a reaction.

Select the product of burning coal.

• Carbon dioxide

• Oxygen

• Hydrogen

• Nitrogen

Select the correct meaning of 'reactant' in a chemical reaction.

• Something you designed.

• Soemthing to buy or sell.

• The things which react together.

• The new things made in a reaction.

Select the reactants when hydrochloric acid reacts with sodium hydroxide to make water and sodium chloride.

• Water and sodium chloride

• Hydrochloric acid and sodium hydroxide

• Water and hydrochloric acid

• Sodium chloride and sodium hydroxide