This page covers AFCAT Redox Reactions with complete concept notes, 16 graded practice MCQs, key points and exam-specific tips. Free to study.
16graded MCQs · easy to hard · full solution & trap analysis
In the reaction 2KMnO₄ + 3H₂O₂ + 3H₂SO₄ → K₂SO₄ + 2MnSO₄ + 5O₂ + 8H₂O, what is the oxidation state change of manganese?
Which species acts as the reducing agent in the reaction: Cl₂ + 2KBr → 2KCl + Br₂?
In the redox reaction 3Cu + 8HNO₃(dilute) → 3Cu(NO₃)₂ + 2NO + 4H₂O, how many electrons are transferred per mole of Cu oxidized?
What is the oxidation state of sulfur in H₂S₂O₃?
In the reaction Fe²⁺ + MnO₄⁻ + H⁺ → Fe³⁺ + Mn²⁺ + H₂O, what is the ratio of Fe²⁺ to MnO₄⁻ that must be used for complete redox balance?
In the redox reaction: 2KMnO₄ + 16HCl → 2KCl + 2MnCl₂ + 5Cl₂ + 8H₂O, what is the oxidation state change of chlorine in HCl that gets oxidized?
In the reaction: H₂SO₄ + C → CO₂ + SO₂ + H₂O, identify the oxidation state of sulfur in H₂SO₄ and SO₂ respectively.
Which species acts as a reducing agent in the reaction: MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O?
In the half-reaction: MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O, how many electrons are transferred and what is reduced?
Calculate the oxidation state of nitrogen in NH₄⁺ and NO₃⁻.
In a redox reaction, if an element loses electrons, it is said to be:
In the reaction: Fe²⁺ + MnO₄⁻ + H⁺ → Fe³⁺ + Mn²⁺ + H₂O (unbalanced), identify the oxidizing agent.
What is the number of electrons transferred when 1 mole of K₂Cr₂O₇ reacts as an oxidizing agent in acidic medium, converting all chromium to Cr³⁺?
When potassium dichromate (K₂Cr₂O₇) oxidizes ferrous ion (Fe²⁺) to ferric ion (Fe³⁺) in acidic medium, one Cr₂O₇²⁻ ion oxidizes how many Fe²⁺ ions?
In the reaction: 3Cu + 8HNO₃(dilute) → 3Cu(NO₃)₂ + 2NO↑ + 4H₂O, which species acts as both oxidizing and reducing agent?