10.2 Science Quiz

What, when put in acid, makes an explosion?

• Magnesium

• Potassium

• Silver

• Zinc

What is the acid used in the reactivity series?

• Sulphur oxide

• Nitric acid

• Hydrochloric acid

• Silicon dioxide

From metals which don't react with acid and water ______ and ____

What is the reactivity series?

• A mob of people

• A series of animals in order of size from largest to smallest.
• A kind of alliance of metals.

• A kind of league of metals.

​ ​ ​ What happens to a piece of metal when it corrodes?

• It loses shiny surface.

• It becomes as light as a feather

• It becomes stronger and more resistant to damage
• They lose their strength

Why metals corrode more quickly near the sea?

• Higher humidity levels
• Stronger sunlight exposure
• Presence of salt in the air and water
• Presence of iron in the water

Copper is used in ________

In stainless steel, the iron is alloyed with iron and?

• 80% - 90% copper

• 50% - 70% aluminum

• 1% - 5% nickel

• 10% - 25% chromium

Alloys are naturally made.

• True

• False

Some mixtures of metals produce alloys that stand up to ________ ______