Reactivity Questions

What is the correct equation when potassium reacts with water?

• 2K (s) + H₂O (l) -->  KOH (aq) + H₂ (g)
• K (s) + 2H₂O (l) -->  KOH (aq) + 2H₂ (g)
• 2K (s) + 2H₂O (l) -->  2KOH (aq) + H₂ (g)
• K (s) + H₂O (l) -->  KOH (aq) + H₂ (g)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following the most reactive in dilute acid

• magnesium
• sodium
• aluminum
• zinc

Tags

NGSS.HS-PS1-2

What is made when magnesium reacts with hydrochloric acid?

• magnesium nitrate and hydrogen gas
• magnesium sulfate and hydrogen gas
• magnesium oxide and oxygen gas
• magnesium chloride and hydrogen gas

When a metal reacts with oxygen gas, the product is ...

• metal hydroxide
• metal oxide
• metal oxide and oxygen
• metal hydroxide and hydrogen gas

Complete the following equation: 
4Fe (s)  +  3O₂ (g) -->

• 4Fe₂O_{3 (s)}
• 2FeO (s)
• 2Fe₂O_{3 (s)}
• 4FeO (s)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which one of the following metals reacts most vigorously with cold water?

• Sodium
• Magnesium
• Copper
• Zinc

Which metal is more reactive than magnesium?

• magnesium
• potassium
• silver
• aluminum

What will be reaction if less reactive metal is added in a solution with more reactive metal compound?

• vigorous reaction
• fizzing gas produced
• burns moderately
• no reaction

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Will silver react with magnesium chloride solution?

• yes
• no

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following will not undergo reaction?

• zinc metal  +  zinc oxide 
• iron metal  +  copper oxide
• zinc metal +  iron oxide
• magnesium  +  iron oxide

Tags

NGSS.HS-PS1-1