# Metals and their uses

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• Created by: Busayoxo
• Created on: 21-12-15 14:24

## 1. Metals that are more reactive than carbon, such as aluminium are extracted by?

• Reduction by iron
• Reduction by carbon
• Electrolysis
• Reduction by oxygen
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## 2. Metals that are less reactive than carbon can be extracted from their oxides by?

• Catalysts
• Reduction with oxygen
• Reduction with carbon
• Electrolysis

## 3. What is the definition of an ore?

• An ore is the product of a reaction
• An ore is an unreactive metal
• An ore contains enough metal to make it economic to extract the metal
• An ore is a mixture of metals

## 4. What must happen to ores before the metal is extracted and purified?

• The ore must become less dense
• The ore must be mined and concentrated
• The ore must have more metals added to it
• The ore must be put in a catalyst