CHS Y9 Revision - Chemistry

How many Calcium atoms are in this compound? 
Ca (OH)₂

• 2
• 3
• 1
• 4

In this reactivity series, which of the following is the most reactive element?

• Gold

• Calcium

• Zinc

• Potassium

In this reactivity series, which of the following is the least reactive element?

• Gold

• Calcium

• Zinc

• Potassium

True or False:

Magnesium is more reactive than silver.

• True

• False

In a displacement reaction, it is the ____________ reactive metal that is displaced from a compound.

• Heaviest

• Least

• Most

• Worst

In the following reaction, which metal has been displaced?

copper sulfate + magnesium → magnesium sulfate + copper

• magnesium

• copper

• sulfate

Choose the least reactive metal

• calcium

• magnesium

• iron

• copper

What does displacement mean?

• A chemical reaction where a less reactive metal takes the place of a more reactive metal in a compound.

• A chemical reaction where a more reactive metal takes the place of a less reactive metal in a compound.

• A more reactive metal is removed from a compound.

Lithium chloride + Iron → ?

• Lithium chloride + Iron (No change)

• Iron chloride + Lithium

• Lithium oxide + hydrogen

Zinc sulphate + Magnesium → ?

• Magnesium + Sulphur + Hydrogen

• Zinc sulphate + Magnesium

• Magnesium sulphate + Zinc