alloy,glass,ceramics and composite materials

A composite material is made of 

• A single material
• Two or more separate materials
• Two or more chemically combined materials
• None of these

A composite material has:

• The same functionality as its components
• Lower functionality than its components
• Higher functionality than its components
• None of these

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.

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.

Alloy is a ...

• A chemical compound with combination between metal and non-metal

• A salt contain of two or more elements where the main element is non-metal

• Mixture of two or more elements where the main element is metal

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

• Purification

• Plating

• Alloying

• Electrolysis

What is the main ingredient in glass?

• soda ash
• limestone
• borax
• silica

Silica is the made of what 2 elements?

• silicon and sulfur
• sulfur and carbon
• carbon and oxygen
• silicon and oxygen 

Which of the following types of glass has the lowest melting point and can be blown into various shapes?

• Lead glass

• soda lime glass

• Borosilicate glass

• Fused silica glass

The type of glass used to make laboratory glass ware is

• Borosilicate glass

• Fused glass

• Lead glass

• Soda glass