Alloys and uses of alloys

Alloy is mixture of

• metals only

• non-metals only

• metals or metal with other non-metals

By making a metal into an alloy, it becomes

• stronger and softer

• softer and harder

• stronger and harder

• softer and brittle

Why alloy is stronger than individual metals?

• brcause alloy contains diamond

• because layers can slide easily

• because layers can not slide easily

• because metals contain graphite

What is the composition of brass?

• Copper and tin

• copper and zinc

• copper and lead

• copper and iron

What is the composition of bronze?

• Copper and zinc

• copper and lead

• copper and tin

• copper and lead

What is the composition of stainless steel?

• Iron, lead, nickel

• Iron, nickel, copper

• Iron, nickel, zinc

• Iron, nickel, chromium