Chemical Changes - GCSE

Which of the following is MOST reactive?

• Magnesium

• Lead

• Tin

• Copper

• Zinc

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

Acid + Metal --> ?

• Salt + Water
• Salt + Hydrogen
• Salt
• Hydrogen

Iron + Hydrochloric acid --> ?

• iron(II) sulfate + water

• iron + hydrogen

• iron(II) chloride + hydrogen

• iron(II) chloride + water

Which gas gives out a 'squeaky pop' when a lighted splint is placed in it?

• hydrogen

• oxygen

• carbon dioxide

• nitrogen

Which of the following does not react with water?

• lithium
• magnesium
• lead
• calcium

Metals react with acids to produce a gas

• Carbon dioxide

• Nitrogen

• Hydrogen

• Oxygen

Metals are good conductor of

• Only heat

• Only electricity

• Heat and electricity both

• None of the above