Retest for p1 chap4 and 6

Magnesium + Hydrochloric acid --> Magnesium chloride + Hydrogen

Which one of the above is your product?

i Magnesium

ii Hydrochloric acid

iii Magnesium chloride

iv Hydrogen

• i, ii

• i, iii

• iii, iv

• ii, iv

Other than temperature change and sound of fizzing, what is the other 2 observation you can see during chemical reaction?

What is the meaning of this symbol?

• Help other substances to burn

• health hazard

• can burn skin and eyes

• damage things that live in water

Define chemical reaction

When a 0.5g Magnesium react with Oxygen, a 1.0g Magnesium oxide formed.

What is the mass of oxygen that reacted?

What is the colour of copper precipitate?

• Red

• Brown

• Blue

• Green

What causes iron to rust? (give 2 condition)

List the 4 layer that made up Earth

Which is NOT the gas that come out of volcano?

• Sulphur dioxide

• Sulphur trioxide

• Carbon dioxide

• Water vapour