Changes to materials

Boiling & Melting point would be come under .................... properties of a substance.

Which is a chemical property ?

• colour

• state - solid/liquid/gas

• how it reacts with water, acids or metals

• heavy or light

Iro reacts with sulphur to form ..................

• iron-sulfide

• iron sulfate

• iron sulfite

When charcoal is burnt, carbon in the coal reacts with ................................. gas to form CO2

Name the reactants in this equation.

• Magnesium , magnesium oxide

• oxygen, magnesium oxide

• oxygen

• magnesium & oxygen

The product in this equation is ........................................

Making toast is a .................................. change.

• chemical

• physical

............................. and ...................... are produced when Pottasium is added to water

• heat, hydrogen

• heat, oxygen

• oxygen

• only heat

What are the products formed ? Complete the equation.

Magnesium + Hydrochloric acid

--------------> __________ + ___________

The process in which acids and alkalis are mixed to make a neutral solution is called ...............................