Chemical changes

A chemical change is a ------------- change

An indication of a chemical reaction is -----------

• colour change

• liquid changes to solid

• no new substance forms

• no fumes

New substances formed in a chemical reaction are called

• Substrate

• Product

• Reactant

• Enzyme

When Copper reacts with OXygen Copper Oxide has formed.Name the compound in this reaction

• Copper

• Oxide

• Copper Oxide

• Oxygen

We use Aluminium to make sauce pans because

• It doesn't rust

• It is magnetic

• It is an insulator

• it is a good heat conductor

The number of elements present in HCl is----------

Calculate the total number of atoms in CuSO₄

Total number of elements in CuSO₄

• 3

• 4

• 7

• 6

What must be present for iron to rust?

• water alone

• Oxygen alone

• Air alone

• Water and oxygen

Which of these pictures shows the particles in a solid, pure metal?

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