CBSE Class 11 (Science) Electrochemical Series — practice questions
55 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 (Science) Electrochemical Series in the app →As per your syllabus, the term OXIDATION (broadened) covers which of the following changes?As per your syllabus, in modern (electron-transfer) terms, OXIDATION is defined as which process?As per your syllabus, an OXIDISING AGENT is best described as which kind of species?As per your syllabus, eqn 7.14, in the reaction 2Na(s) + S(s) → Na₂S(s), which species is OXIDISED?As per your syllabus, in Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s), which acts as the reducing agent?As per your syllabus, the electron-releasing (reducing) tendency among the metals Zn, Cu, Ag is in which orderAs per your syllabus, oxidation can also be characterised as the addition of which kind of element to a substaAs per your syllabus, eqn 7.4, in 2H₂S(g) + O₂(g) → 2S(s) + 2H₂O(l), H₂S is oxidised mainly because of which cAs per your syllabus, a HALF REACTION is best characterised as which kind of equation?As per your syllabus, in 2Na(s) + H₂(g) → 2NaH(s), the role of hydrogen is which?As per your syllabus, when Cu(s) is placed in AgNO₃(aq), the equilibrium of Cu + 2Ag⁺ → Cu²⁺ + 2Ag favours whiAs per your syllabus, when Co(s) is placed in NiSO₄(aq), which describes the position of the resulting equilibAs per your syllabus, the oxidation number of oxygen in a normal PEROXIDE (e.g. H₂O₂, Na₂O₂) is which?As per your syllabus, the oxidation number of oxygen in a SUPEROXIDE (e.g. KO₂, RbO₂) is which?As per your syllabus, the oxidation number of oxygen in OF₂ (oxygen difluoride) is which?As per your syllabus, the oxidation number of hydrogen in a binary metal HYDRIDE (e.g. NaH, LiH, CaH₂) is whicAs per your syllabus, the oxidation number of an atom in any element in its FREE / UNCOMBINED form (e.g. O₂, PAs per your syllabus, rules, the oxidation number of sulphur in H₂SO₄ is which?As per your syllabus, rules, the oxidation number of chromium in K₂Cr₂O₇ is which?As per your syllabus, rules, the oxidation number of Mn in KMnO₄ is which?As per your syllabus, Problem 7.3 (Stock notation), the iron in Fe₂O₃ is best written with which Roman numeralAs per your syllabus, MnO₂ is best written as which formula?As per your syllabus, the highest oxidation state of chlorine in its compounds (e.g. HClO₄) is which?As per your syllabus, the AVERAGE oxidation number of S in S₄O₆²⁻ (tetrathionate) is which?As per your syllabus, a COMBINATION reaction is classified as redox under which condition?As per your syllabus, the decomposition CaCO₃(s) → CaO(s) + CO₂(g) is classified as which kind of reaction?As per your syllabus, the reaction CuSO₄(aq) + Zn(s) → ZnSO₄(aq) + Cu(s) is classified as which type?As per your syllabus, eqn 7.32, the reaction Cr₂O₃(s) + 2 Al(s) → Al₂O₃(s) + 2 Cr(s) is an example of which inAs per your syllabus, the OXIDISING strength among halogens decreases in which order?As per your syllabus, the reaction Cl₂(g) + 2 KI(aq) → 2 KCl(aq) + I₂(s) is an example of which kind?As per your syllabus, eqn 7.45, in 2H₂O₂(aq) → 2H₂O(l) + O₂(g), the oxidation states of O in H₂O₂, O₂, and H₂OAs per your syllabus, eqn 7.48, Cl₂(g) + 2 OH⁻ → ClO⁻ + Cl⁻ + H₂O has Cl in which oxidation states in productsAs per your syllabus, which halogen does NOT undergo disproportionation with alkali (unlike Cl₂, Br₂, I₂)?As per your syllabus, among the chlorine oxoanions ClO⁻, ClO₂⁻, ClO₃⁻, ClO₄⁻, which one does NOT disproportionAs per your syllabus, eqn 7.40, the reaction 2 H₂O + 2 F₂ → 4 HF + O₂ shows which species being oxidised?As per your syllabus, the TWO methods used to balance redox reactions are which?As per your syllabus, the balanced ionic equation for Cr₂O₇²⁻ + SO₃²⁻ → Cr³⁺ + SO₄²⁻ in acid solution uses howAs per your syllabus, the same Cr₂O₇²⁻ + SO₃²⁻ balanced equation produces how many H₂O molecules on the producAs per your syllabus, Step 4 for an ACIDIC medium adds which species?As per your syllabus, eqn 7.54, the balanced reduction half-reaction for Cr₂O₇²⁻ in acidic medium consumes howAs per your syllabus, eqn 7.54, the balanced reduction half-reaction for Cr₂O₇²⁻ in acidic medium gains how maAs per your syllabus, for a BASIC medium, oxygen balance is achieved by adding which species?As per your syllabus, the balanced reaction of MnO₄⁻ with Br⁻ in BASIC medium gives MnO₂ and which Br species?As per your syllabus, OXIDATION in terms of oxidation number means which change?As per your syllabus, in 2Cu₂O(s) + Cu₂S(s) → 6Cu(s) + SO₂(g), which species is REDUCED?As per your syllabus, the reaction N₂(g) + O₂(g) → 2 NO(g) is classified as which type of redox?As per your syllabus, the reaction 2 NO₂(g) + 2 OH⁻ → NO₂⁻ + NO₃⁻ + H₂O is classified as which type?In the modern electron-transfer view, a REDUCING AGENT isThe reaction $\mathrm{Zn}(s) + \mathrm{CuSO}_4(aq) \rightarrow \mathrm{ZnSO}_4(aq) + \mathrm{Cu}(s)$ is best cWhat is the oxidation number of manganese in potassium permanganate, $\mathrm{KMnO}_4$? (K is $+1$, O is $-2$ What is the oxidation number of chromium in potassium dichromate, $\mathrm{K}_2\mathrm{Cr}_2\mathrm{O}_7$?In the thiosulphate ion $\mathrm{S}_2\mathrm{O}_3^{2-}$, what is the AVERAGE oxidation number of sulphur?How many electrons are transferred per dichromate ion when $\mathrm{Cr}_2\mathrm{O}_7^{2-}$ is reduced to $\maBalance the half-reaction $\mathrm{MnO}_4^- \rightarrow \mathrm{Mn}^{2+}$ in acidic medium. How many electronsWhat is the AVERAGE oxidation number of sulphur in the tetrathionate ion $\mathrm{S}_4\mathrm{O}_6^{2-}$?