5.3 Metal Mixtures

5.3 Metal Mixtures

By Silvaraj David

Multiple Choice

How are alloys made?

• Alloys are made by melting and mixing metals or a metal with non-metals.
• Alloys are formed by layering different metals without heat.
• Alloys are created by cooling metals rapidly without mixing.
• Alloys are made by grinding metals together.

Multiple Choice

What makes a bronze?

• Copper and aluminum are the main components of bronze.
• Bronze consists of zinc and nickel.
• Bronze is made from iron and lead.
• Copper and tin are the main components of bronze.

Multiple Choice

What is steel made up of?

• Steel is made up of iron and carbon.
• Steel is made up of aluminum and copper.
• Steel is made up of plastic and rubber.
• Steel is made up of wood and glass.

Multiple Choice

What is added to steel to make them resist rust?

• Copper and Gold

• Lead and Iron

• Zinc and Copper

• Chromium and nickel

Multiple Choice

Why alloy is harder?

• Alloy is harder because it is lighter than pure metals.
• Alloy is harder because it is made of a single metal.
• Alloy is harder due to its higher temperature during production.
• Alloy is harder because it contains different elements that disrupt atomic arrangement, hindering dislocation movement.

​Read this on page 164

Multiple Choice

Are coins made up of alloy?

• Yes, coins are made up of alloy.
• All coins are made of gold.
• Coins are made of paper and plastic.
• No, coins are made of pure metal.

Multiple Choice

Should coins be malleable?

• Yes, coins should be slightly malleable.

• Yes, coins should be highly malleable

• No, coins should be rigid.
• Coins should be non-circular.

Multiple Choice

Is pure gold soft or hard?

• Flexible
• Soft
• Brittle
• Very hard

Multiple Choice

What are the other metals usind in gold jewellery with gold?

• Copper, Silver and Magnesium

• Zinc, copper and Titanium

• White gold

• Silver, Zinc and copper

Multiple Choice

What is the name of the alloy to make aeroplanes body?

• Durianlumin

• Duralumin

• Durablemin

• Duraluminium

Read this from page 165

Multiple Choice

Above diagram is an aeroplane. What type of alloy is used to make this aeroplane?

• Steel

• Duralumin

• Pewter

• Brass

Multiple Choice

Which one is made for medal

• aluminium

• pewter

• bronze

• steel

Multiple Choice

Shape memory alloy used in glass frames is the mixture of _____

• titanium and aluminium

• carbon and tin

• copper and steel

• nickel and titanium

Multiple Choice

Pure metals are

• too hard

• too dull

• too brittle

• too soft

Multiple Choice

Many alloys are softer than the elements that are in them.

• True

• False

Multiple Choice

Above figure is the Petronas twin tower building. What type of Alloy is use to build this building?

• Steel

• Brass

• Duralumin

• Pewter

Multiple Choice

Which of these is a property of metals?

• It's malleable
• It can't conduct electricity
• They are used in food
• It's very brittle

Multiple Choice

Iron is a good conductor, malleable and magnetic. What type of element is Iron? 

• Metal
• Nonmetal
• Metalloid
• Pretty

Multiple Choice

If a material can easily be drawn into the shape of a wire, it is

• Ductile
• Magnetic
• Malleable
• Reactive

Multiple Choice

Which of the following is a property of a non-metal?

• Lustrous

• Low melting and boiling points

• Malleable

• Ductile

Multiple Choice

Which of the following is not a property of a metal?

• Lustrous

• Ductile

• Brittle

• Dense

Multiple Select

What can act as an insulator, preventing the movement, of electricity?

• glass

• wood

• rubber

• copper

Multiple Choice

Which is a liquid metal

• Mercury

• Gold

• silver

• brass

Multiple Choice

Brass is an alloy made of

• copper and zinc

• copper and tin

• copper and nickel

• copper and aluminum

Multiple Choice

Steel generally speaking is made of

• iron and carbon

• copper and iron

• tin and carbon

• aluminum and nickel

Multiple Choice

Steel can become stainless when alloyed with _____.

• chromium and nickel

• copper and zinc

• tin and lead

• iron aand carbon

Multiple Choice

An alloy is harder than its pure metal because the foreign atoms in the alloy

• increase the bond strength between the atoms.

• increase the empty spaces between the atoms.

• react with the pure metal atoms to form a compound.

• reduce the ability of the atoms to slide across each other.

Multiple Choice

Is carbon, metal?

• No
• Wood
• Plastic
• Yes

Multiple Choice

All metals are magnetic

• Partially true
• True
• False
• Depends on the metal

Multiple Choice

Which of the following characteristics belong to pure metals?

I. Ductile

II. Malleable

III. Brittle

IV. Good conductor of electricity

• I and II

• I and IV

• I, II and IV

• I, II, III and IV

Multiple Choice

Which is the follow processes increases the hardness of a metal?

• Purification

• Plating

• Alloying

• Electrolysis