Chemistry T3 Revision

A difference between physical and chemical change is

• physical change is when we get a new product

• chemical change is when we get a new product

• Physical change is irreversible

• chemical change is reversible

Physical change is changing the appearance of a material but not changing it into a different substance.

• True

• False

Which of the following are properties of a chemical change?

• Chemical change is reversible

• Chemical change only changes the appearance of a material

• Chemical change results in a new substance

• Chemical change is irreversible

All of the following are chemical changes except

• cooking food

• burning wood

• evaporating water

• rusting

All of the following are physical changes except

• ripping paper

• melting wax

• burning of a candle

• boiling water

The products of burning a candle are

• oxygen and water

• oxygen and carbon dioxide

• carbon dioxide and water

• wax and carbon dioxide

Every fire likes

• Fuel

• Oxygen

• Carbon dioxide

• Heat

If a fire (burning) is deprived of ________, it will turn off.

• Carbon dioxide

• Water

• Oxygen

• Hydrogen

Magnesium + Oxygen -> Magnesium oxide

Magnesium is a

• reactant

• product

• reactant and product

Magnesium + Oxygen -> Magnesium oxide

This is

• a reversible reaction

• an irreversible reaction