15 Key points for C4 Chemical changes

Acid + Metal --> ?

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

Tags

NGSS.MS-PS1-2

Iron + Hydrochloric acid --> ?

• iron sulfate + water
• iron + hydrogen
• iron chloride + hydrogen
• iron chloride + water

Magnesium + sulphuric acid --> ?

• magnesium sulfate + water
• magnesium sulfate + hydrogen
• magnesium chloride + hydrogen
• magnesium chloride + water

Tags

NGSS.HS-PS1-2

Zinc + nitric acid --> ?

• zinc sulfate + water
• zinc sulfate + hydrogen
• zinc nitrate + hydrogen
• zinc chloride + water

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

• hydrogen
• oxygen
• carbon dioxide
• nitrogen

Which metal is the least reactive out of: copper, magnesium, zinc and iron?

• copper
• magnesium
• zinc
• iron

Which equation correctly shows the reaction of zinc with oxygen?

• Zn + O --> ZnO
• Zn + O₂ --> ZnO
• 2Zn + O₂ --> 2ZnO
• Zn + O₂ --> 2ZnO

What is the state symbol for a solution?

• (S)
• (s)
• (sl)
• (aq)

Which equation correctly shows the displacement of copper by zinc?

• copper + zinc sulphate --> copper sulfate + zinc
• zinc sulphate + copper --> copper sulfate + zinc
• copper sulfate + zinc --> zinc sulfate + copper

A rock that a metal can be extracted from is known as _____

• an ore
• a composite
• a polymer
• a cermaic