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AP Intermediate 1st Year Redox Reactions — practice questions

Explore 55 free Redox Reactions questions in AP Intermediate 1st Year Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Redox Reactions questions and exercises with answers

Showing questions 1–30 of 55.

As per your syllabus, the term OXIDATION (broadened) covers which of the following changes?Read the answer and worked solution →As per your syllabus, in modern (electron-transfer) terms, OXIDATION is defined as which process?Read the answer and worked solution →As per your syllabus, an OXIDISING AGENT is best described as which kind of species?Read the answer and worked solution →As per your syllabus, eqn 7.14, in the reaction 2Na(s) + S(s) → Na₂S(s), which species is OXIDISED?Read the answer and worked solution →As per your syllabus, in Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s), which acts as the reducing agent?Read the answer and worked solution →As per your syllabus, the electron-releasing (reducing) tendency among the metals Zn, Cu, Ag is in which order?Read the answer and worked solution →As per your syllabus, oxidation can also be characterised as the addition of which kind of element to a substance?Read the answer and worked solution →As per your syllabus, eqn 7.4, in 2H₂S(g) + O₂(g) → 2S(s) + 2H₂O(l), H₂S is oxidised mainly because of which change?Read the answer and worked solution →As per your syllabus, a HALF REACTION is best characterised as which kind of equation?Read the answer and worked solution →As per your syllabus, in 2Na(s) + H₂(g) → 2NaH(s), the role of hydrogen is which?Read the answer and worked solution →As per your syllabus, when Cu(s) is placed in AgNO₃(aq), the equilibrium of Cu + 2Ag⁺ → Cu²⁺ + 2Ag favours which side?Read the answer and worked solution →As per your syllabus, when Co(s) is placed in NiSO₄(aq), which describes the position of the resulting equilibrium?Read the answer and worked solution →As per your syllabus, the oxidation number of oxygen in a normal PEROXIDE (e.g. H₂O₂, Na₂O₂) is which?Read the answer and worked solution →As per your syllabus, the oxidation number of oxygen in a SUPEROXIDE (e.g. KO₂, RbO₂) is which?Read the answer and worked solution →As per your syllabus, the oxidation number of oxygen in OF₂ (oxygen difluoride) is which?Read the answer and worked solution →As per your syllabus, the oxidation number of hydrogen in a binary metal HYDRIDE (e.g. NaH, LiH, CaH₂) is which?Read the answer and worked solution →As per your syllabus, the oxidation number of an atom in any element in its FREE / UNCOMBINED form (e.g. O₂, P₄, S₈) is which?Read the answer and worked solution →As per your syllabus, rules, the oxidation number of sulphur in H₂SO₄ is which?Read the answer and worked solution →As per your syllabus, rules, the oxidation number of chromium in K₂Cr₂O₇ is which?Read the answer and worked solution →As per your syllabus, rules, the oxidation number of Mn in KMnO₄ is which?Read the answer and worked solution →As per your syllabus, Problem 7.3 (Stock notation), the iron in Fe₂O₃ is best written with which Roman numeral?Read the answer and worked solution →As per your syllabus, MnO₂ is best written as which formula?Read the answer and worked solution →As per your syllabus, the highest oxidation state of chlorine in its compounds (e.g. HClO₄) is which?Read the answer and worked solution →As per your syllabus, the AVERAGE oxidation number of S in S₄O₆²⁻ (tetrathionate) is which?Read the answer and worked solution →As per your syllabus, a COMBINATION reaction is classified as redox under which condition?Read the answer and worked solution →As per your syllabus, the decomposition CaCO₃(s) → CaO(s) + CO₂(g) is classified as which kind of reaction?Read the answer and worked solution →As per your syllabus, the reaction CuSO₄(aq) + Zn(s) → ZnSO₄(aq) + Cu(s) is classified as which type?Read the answer and worked solution →As per your syllabus, eqn 7.32, the reaction Cr₂O₃(s) + 2 Al(s) → Al₂O₃(s) + 2 Cr(s) is an example of which industrial method?Read the answer and worked solution →As per your syllabus, the OXIDISING strength among halogens decreases in which order?Read the answer and worked solution →As per your syllabus, the reaction Cl₂(g) + 2 KI(aq) → 2 KCl(aq) + I₂(s) is an example of which kind?Read the answer and worked solution →

Worked practice questions

As per your syllabus, the term OXIDATION (broadened) covers which of the following changes?

  1. Loss of mass only
  2. Gain of protons only
  3. Addition of O or removal of H
  4. Addition of H or removal of O
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Correct answer: C. Addition of O or removal of H

Your syllabus: oxidation = add O / electronegative element OR remove H / electropositive element. Reduction is the reverse.

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As per your syllabus, in modern (electron-transfer) terms, OXIDATION is defined as which process?

  1. Gain of electrons
  2. Loss of mass
  3. Gain of protons
  4. Loss of electrons
Show answer and solution

Correct answer: D. Loss of electrons

Your syllabus: oxidation = loss of e⁻ (OIL) reduction = gain of e⁻ (RIG). Oxidising agent accepts e⁻; reducing agent donates e⁻.

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As per your syllabus, an OXIDISING AGENT is best described as which kind of species?

  1. Acceptor of protons
  2. Acceptor of electrons
  3. Donor of electrons
  4. Donor of protons
Show answer and solution

Correct answer: B. Acceptor of electrons

Your syllabus: oxidant accepts e⁻ (and gets reduced) reductant donates e⁻ (and gets oxidised).

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