Grade 8A mini Quiz

Which below are natural polymers?

• Cellulose

• Nylon

• Silk

• Polyester

Polymers are material made up of repeating units called...?

• monomers

• monochromes

• electrons

• elastomers

A polymer made in the laboratory (or industry) usually made from petrochemicals

• nature polymer

• natural polymer

• protein

• synthetic polymer

True or False: Proteins are a type of synthetic polymer.

• True

• False

Select all the examples of polymers.

• water

• oxygen

• protein

• latex

• cotton

Why are alloys generally used to make everyday objects?

• Alloys are often stronger and less active than pure metals.
• Alloys have higher melting point than pure metals.
• Alloys are less expensive to produce than pure metals.
• Alloys have ionic bonds instead of metallic bonds.

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

• ductile
• good electrical conductor
• good thermal insulator
• malleable

Steel generally speaking is made of

• iron and carbon

• copper and iron

• tin and carbon

• aluminum and nickel

Which of the following is not the aim of alloying?

• To increase the strength and hardness of metal.

• To prevent corrosion of metal.

• To improve the appearance of metal

• To increase the melting point.

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