Metals

Question 1

What is the name of an alloy that has 65% copper and 35% zinc?
Name the uses as well as properties of it.

Answer 1

Brass
Uses are musical instruments
Properties include hard, resists corrosion, attractive appearance.

Question 2

What are two main steps in extraction of metals.

Answer 2

• Separate the ore into the required minerals and the unwanted gangue, which is carried out by froth floatation.
• Extract the metal from the mineral, either carried out by roasting or electrolysis.

Question 3

What alloy has 80% iron, 18% chromium and 2% nickel?

Name the uses and special properties of it.

Answer 3

Stainless steel.
Uses are cutlery, sinks, machinery
Properties are that they are strong and resists corrosion.

Question 4

Define alloy.

Answer 4

Mixtures of metals.

Question 5

What alloy has 99% iron and 1% carbon?

Name the uses and properties associated with it.

Answer 5

Carbon steel
Uses are for bridges, scissors, car bodies
Properties are that they are hard.

Question 6

What alloy has 85% copper and 15% tin?

Name the uses and properties of it.

Answer 6

Bronze
Uses are statues, medals
Properties are that it is hard, resists corrosion attractive appearance

Question 7

What is the name of alloy that has 63% tin and 37% lead?

As well as naming the uses and special properties of it.

Answer 7

Solder.
Uses is joining metal joints.
Special properties are low melting point, easily worked.