F3 Science Chapter 4: Reactivity of Metal

Which of the following is a compound?

• Galena

• Silver

• Gold

• Diamond

Which of the following is an element?

• Bauxite

• Hematite

• Gold

• Cassiterite

Hematite consists of

• iron and oxygen

• tin and oxygen

• aluminium and oxygen

• silicon and oxygen

Galena consists of

• lead and sulphur

• iron and sulphur

• aluminium and sulphur

• tin and sulphur

In a vigorous reaction between a more reactive metal such as magnesium and oxygen , what is the observation?

• Only a glow or slow change to colour is observed.

• No reaction occurs.

• A bright flame is observed.

In a less vigorous reaction between a less reactive metal such as iron and oxygen , what is the observation?

• Only a glow or slow change to colour is observed.

• No reaction occurs.

• A bright flame is observed.

Zinc oxide turns ( ) when hot and white on cooling.

• yellow

• blue

• green

• red

Magnesium is more reactive than

• calcium

• sodium

• potassium

• copper

Zinc is less reactive than

• ferum

• stanum

• plumbum

• aluminium

The extraction of aluminium is through

• electolysis

• reduction of the oxides using carbon

• heating