S2 Chemistry Core 4

Which of the following metals reacts with water?

• Magnesium

• Iron

• Silver

• potassium

Which method of extraction is used to extract potassium from its ore?

• Heat alone

• Heating with carbon

• Electrolysis

• Using a magnet

What is a metal ore?

• Naturally occurring metal compound in rocks

• A pure element found in rocks

The energy in an electrochemical cell comes from

• The wires

• The electrolyte

• Chemical reactions

An electrolyte is a conductive solution?

• True

• False

Which of the following metals can be extracted from its ore by heat alone?

• Iron

• silver

• Calcium

• Soodium

Whioch of the following pairs of metals will give the LARGEST voltage?

• Iron and Zinc

• Potassium and Sodium

• Magnesium and silver

• Sodium and Lithium

Which of the following could be used as the electrolyte solution in an electrochemical cell?

• Hydrochloric acid

• Sodium

• Magnesium

Which of the following metals is found in its pure form?

• Aluminium

• Calcium

• Gold

• Iron

What would happen to a silver ring if it was dropped into some acid?

• It will react

• Nothing will happen

• It will catch fire