Quiz about Metal and Oxygen Reactions

Question 1

What is formed from a reaction between a metal and oxygen?

Accepted Answer

metal oxide

Answer

metal hydroxide

Answer

metal carbonate

Question 2

What is the missing reactant in the equation shown? Potassium reacts with o _ _ _ _ _ to form potassium oxide.

Accepted Answer

oxygen

Answer

hydrogen

Answer

nitrogen

Answer

carbon

Question 3

What is the missing reactant in the equation shown? I _ _ _ reacts with oxygen to form iron oxide.

Accepted Answer

iron

Answer

copper

Answer

aluminum

Answer

zinc

Question 4

When a metal forms an oxide, we say that the metal has _______.

Accepted Answer

corroded

Answer

rusted

Question 5

Which common metal oxide is often called rust?

Accepted Answer

iron oxide

Answer

copper oxide

Answer

lead oxide

Question 6

What is the typical pH of a metal oxide?

Accepted Answer

equal to or greater than pH 8

Answer

equal to or less than pH 6

Answer

pH 7

Question 7

True or false? All metal oxides are soluble.

Accepted Answer

false

Answer

true

Question 8

What is the missing reactant in the equation shown? Copper reacts with o _ _ _ _ _ to form copper oxide.

Accepted Answer

oxygen.

Answer

hydrogen.

Answer

nitrogen.

Answer

carbon dioxide.

Question 9

Why do different metals react differently with oxygen?

Accepted Answer

Different metals have different levels of reactivity.

Answer

Oxygen is more reactive with some metals than with others.

Question 10

It's important that objects made from metals don't corrode. Which metal from the reactivity series shown is least likely to corrode?

Accepted Answer

Platinum

Answer

Potassium

Answer

Sodium

Answer

Iron

Question 11

Metal bridges often corrode. What is the best way to prevent the corrosion from happening?

Accepted Answer

Cover the metal with a protective barrier, such as paint or oil.

Answer

Keep the metal dry.

Answer

Remove the oxide layer from the metal.

Question 12

Some metals, such as aluminium, initially react quickly with oxygen in the air, but then they stop reacting. Why does the metal oxide layer stop the reaction?

Accepted Answer

The metal oxide layer is non-porous, so it acts as a barrier between the metal and oxygen in the air.

Answer

The metal oxide layer is porous, so it doesn't act as a barrier between the metal and oxygen in the air.

Question 13

Some metals, such as iron, continue to react with oxygen in the air despite the formation of a metal oxide layer. Why does the metal oxide layer not stop the reaction?

Accepted Answer

The metal oxide layer is porous, so it doesn't act as a barrier between the metal and oxygen in the air.

Answer

Some metals form a porous oxide layer that allows fluids to permeate through to the metal and the corrosion reaction to continue.

Answer

The oxide layer of iron is porous.

Answer

The metal oxide layer is non-porous, so it acts as a barrier between the metal and oxygen in the air.

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