Redox Reactions Challenge

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Test your knowledge on redox reactions for iGCSE!

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Nivedita Singh

India

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3	aadya 4 de Agosto de 2025	% 67	04:37
4	Vivaan Shah 4 de Agosto de 2025	% 56	02:05

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Redox Reactions ChallengeVersión en línea Test your knowledge on redox reactions for iGCSE! por Nivedita Singh 1 What is the role of an oxidising agent in a redox reaction? a It accepts electrons and gets reduced b It remains unchanged c It gets oxidised d It donates electrons 2 Which of these is a reducing agent? a Chlorine b Oxygen c Carbon in combustion d Nitrogen 3 What is the half-equation for the oxidation of zinc? a Zn + 2e⁻ → Zn²⁺ b Zn → Zn²⁺ + 2e⁻ c Zn → Zn + 2e⁻ d Zn²⁺ + 2e⁻ → Zn 4 In a redox reaction, what does the reduction process involve? a Loss of electrons b Gain of protons c Gain of electrons d Loss of protons 5 Which substance acts as an oxidising agent in the reaction: Fe²⁺ + MnO₄⁻ → Fe³⁺ + Mn²⁺? a Mn²⁺ b Fe²⁺ c Fe³⁺ d MnO₄⁻ 6 What is the half-equation for the reduction of permanganate (MnO₄⁻) in acidic solution? a MnO₄⁻ + 4H⁺ + 3e⁻ → MnO₂ + 2H₂O b MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O c MnO₄⁻ + e⁻ → MnO₂ d MnO₄⁻ → MnO₂ + 2O₂ 7 Which of these reactions demonstrates a redox process? a Rusting of iron b Dissolving sugar in water c Boiling water d Mixing vinegar and baking soda 8 Which of these is a common oxidising agent in bleaching? a Hydrogen peroxide b Sodium chloride c Chlorine bleach d Ammonia 9 In the reaction: 2Na + Cl₂ → 2NaCl, which is the reducing agent? a NaCl b Both c Na d Cl₂

Redox Reactions ChallengeVersión en línea

Test your knowledge on redox reactions for iGCSE!

por Nivedita Singh

What is the role of an oxidising agent in a redox reaction?

It accepts electrons and gets reduced

It remains unchanged

It gets oxidised

It donates electrons

Which of these is a reducing agent?

Chlorine

Oxygen

Carbon in combustion

Nitrogen

What is the half-equation for the oxidation of zinc?

Zn + 2e⁻ → Zn²⁺

Zn → Zn²⁺ + 2e⁻

Zn → Zn + 2e⁻

Zn²⁺ + 2e⁻ → Zn

In a redox reaction, what does the reduction process involve?

Loss of electrons

Gain of protons

Gain of electrons

Loss of protons

Which substance acts as an oxidising agent in the reaction: Fe²⁺ + MnO₄⁻ → Fe³⁺ + Mn²⁺?

Mn²⁺

Fe²⁺

Fe³⁺

MnO₄⁻

What is the half-equation for the reduction of permanganate (MnO₄⁻) in acidic solution?

MnO₄⁻ + 4H⁺ + 3e⁻ → MnO₂ + 2H₂O

MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O

MnO₄⁻ + e⁻ → MnO₂

MnO₄⁻ → MnO₂ + 2O₂

Which of these reactions demonstrates a redox process?

Rusting of iron

Dissolving sugar in water

Boiling water

Mixing vinegar and baking soda

Which of these is a common oxidising agent in bleaching?

Hydrogen peroxide

Sodium chloride

Chlorine bleach

Ammonia

In the reaction: 2Na + Cl₂ → 2NaCl, which is the reducing agent?

NaCl

Both

Cl₂

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Redox Reactions Challenge

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Redox Reactions ChallengeVersión en línea

por Nivedita Singh

What is the role of an oxidising agent in a redox reaction?

Which of these is a reducing agent?

What is the half-equation for the oxidation of zinc?

In a redox reaction, what does the reduction process involve?

Which substance acts as an oxidising agent in the reaction: Fe²⁺ + MnO₄⁻ → Fe³⁺ + Mn²⁺?

What is the half-equation for the reduction of permanganate (MnO₄⁻) in acidic solution?

Which of these reactions demonstrates a redox process?

Which of these is a common oxidising agent in bleaching?

In the reaction: 2Na + Cl₂ → 2NaCl, which is the reducing agent?

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