Redox Reaction MCQ

Aluminium reacts with iron(III) oxide as shown.

iron(III) oxide + aluminium → iron + aluminium oxide

Which statement about this reaction is correct?

• Aluminium is oxidised.

• Aluminium oxide is reduced.

• Iron(III) oxide is oxidised.

• Iron is oxidised.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The equations all show redox reactions.

Which oxide is oxidised in these reactions?

• Fe₂O₃

• CO

• ZnO

• NO

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A violent reaction occurs when a mixture of chromium(III) oxide and aluminium is ignited with a magnesium fuse as shown.

The equation for the reaction is shown.

Cr₂O₃ + 2Al → 2Cr + Al₂O₃

Which substance is oxidised in the reaction?

• aluminium

• aluminium oxide

• chromium

• chromium(III) oxide

Tags

NGSS.HS-PS1-2

The element vanadium, V, forms several oxides.

In which change is oxidation taking place?

• VO₂ → V₂O₃

• V₂O₅ → VO₂

• V₂O₃ → VO

• V₂O₃ → V₂O₅

Tags

NGSS.HS-PS1-2

The reaction between magnesium and carbon dioxide is represented by the following equation.

2Mg + CO₂ → 2MgO + C

Which statement describes what happens in this reaction?

• Carbon is oxidised.

• Magnesium is reduced.

• Neither oxidation nor reduction happens

• The carbon in carbon dioxide is reduced.

In which change is chromium(II) oxide, CrO, reduced?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-2

In which equation does the oxidation of the underlined compound occur?

• 2CuO + C → CO₂ + Cu

• Fe₂O₃ + 3CO → 2Fe + 3CO₂

• 2Mg + O₂ → 2MgO

• MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In which change is N₂O₃ oxidised?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When copper is heated in air a black coating forms on the copper.

What happens to the copper in this reaction?

• The copper catches fire.

• The copper decomposes.

• The copper gains oxygen

• The copper loses oxygen.

Tags

NGSS.MS-PS1-2

The equations for two reactions P and Q are given.

In which of these reactions does oxidation of the underlined substance occur?

• A

• B

• C

• D