Iron and Zinc Reactions Quiz

What color change indicates the reduction of iron(III) to iron(II)?

• Green to brown

• Blue to red

• Red to blue

• Brown to green

What role does zinc powder play in the reaction with iron(III) ions?

• Oxidizing agent

• Catalyst

• Inert substance

• Reducing agent

Which equation correctly represents the conversion of zinc in the reaction?

• Zn to Zn2+

• Zn2+ to Zn

• Fe3+ to Fe2+

• Fe2+ to Fe3+

How many electrons are added to balance the half-equation for iron(III) to iron(II)?

• One electron

• Two electrons

• Four electrons

• Three electrons

Which of the following undergoes reduction in the reaction?

• Iron(II) ions

• Sodium hydroxide

• Iron(III) ions

• Zinc

What is the color of the precipitate formed when sodium hydroxide is added to the solution?

• Dark blue

• Dirty green

• Light blue

• Bright green

What happens to the precipitate when excess sodium hydroxide is added?

• It dissolves

• It remains unchanged

• It turns blue

• It turns red

Which reducing agent is mentioned as an alternative to zinc?

• Copper

• Magnesium

• Aluminum

• Silver

What color indicates the presence of iron(II) ions in the confirmation test with potassium compounds?

• Pink

• Greenish brown

• Dark blue

• Light blue

What is the color of the solution when iron(III) ions are confirmed using potassium compounds?

• Pink

• Greenish brown

• Light blue

• Blood red