Extraction And Uses Of Metals

Question 1

Define an ore

Answer 1

A naturally occurring solid material from which a metal or valuable material can be extracted profitably.

Question 2

How can we extract metals below carbon in the reactivity series from their ore?

Answer 2

By reacting them with carbon (a displacement reaction )

Question 3

How can we extract metals above carbon in the reactivity series from their ore?

Answer 3

By electrolysis or reaction with a more reactive metal

Question 4

Give an example of carbon extraction

Answer 4

Iron

Question 5

Give an example of electrolysis

Answer 5

Aluminium

Question 6

Define an alloy

Answer 6

A mixture of a metal, with usually other metals or carbon

Question 7

Why are alloys usually harder than pure metals

Answer 7

The different elements have slightly different sized atoms, breaking up the regular lattice arrangement and making it more difficult for layers to slide over each other.