Which of these is not a redox reaction?

• Cu₂O + H₂SO₄ ⟶ CuSO₄ + Cu + H₂O

• MgO + 2HCl ⟶ MgCl₂ + H₂O

• SnCl₂ + HgCl₂ ⟶ Hg + SnCl₄

• MnO₂ + 4HCl ⟶ MnCl₂ + 2H₂O + Cl₂

Tags

NGSS.HS-PS1-7

Which species is not produced by a redox reaction between solid sodium iodide and concentrated sulfuric acid?

• Na₂SO₄

• H₂S

• S

• SO₂

V₂O₅ can be used as a catalyst in the Contact Process.

Which is a step in the Contact Process in which the vanadium is oxidised?

• SO₂ + V₂O₅ ⟶ SO₃ + 2VO₂

• SO₃ + 2VO₂ ⟶ SO₂ + V₂O₅

• 2VO₂ + 0.5O₂ ⟶ V₂O₅

• V₂O₅ ⟶ 2VO₂ + 0.5O₂

Which of these shows nitrogen in its correct oxidation states in the compounds given?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these is a redox reaction?

• CaO + SiO₂ ⟶ CaSiO₃

• H₂SO₄ + Na₂O ⟶ Na₂SO₄ + H₂O

• NaBr + H₂SO₄ ⟶ NaHSO₄ + HBr

• Mg + S ⟶ MgS

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these species is the best reducing agent?

• Cl₂

• Cl⁻

• I₂

• I⁻

Which of the following shows chlorine in its correct oxidation states in the compounds shown?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which substance is not produced in a redox reaction when solid sodium iodide reacts with concentrated sulfuric acid?

• H₂S

• HI

• SO₂

• I₂

In which reaction is hydrogen acting as an oxidising agent?

• Cl₂ + H₂ --> 2HCl

• (CH₃)₂CO + H₂ --> (CH₃)₂CHOH

• N₂ + 3H₂ --> 2NH₃

• 2Na + H₂ --> 2NaH

Tags

NGSS.HS-PS1-2

In which reaction is the metal oxidised?

• 2Cu²⁺ + 4I^– --> 2CuI + I₂

• [Fe(H₂O)₆]³⁺ + Cl^– --> [Fe(H₂O)₅(Cl)]²⁺ + H₂O

• [CoCl₄]^2– + 6H₂O --> [Co(H₂O)₆]²⁺ + 4Cl^–

• Mg + S --> MgS

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2