Assertion (A): Electrolysis of aqueous solution of NaCl gives chlorine gas at anode instead of oxygen gas. Reason (R): Formation of oxygen gas at anode requires overpotential.

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Assertion-ReasonProducts of ElectrolysisCBSE PYQ

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Four half reactions I to IV are shown below : I. 2Cl⁻ → Cl₂ + 2e⁻, II. 4OH⁻ → O₂ + 2H₂O + 2e⁻, III. Na⁺ + e⁻ → Na, IV. 2H⁺ + 2e⁻ → H₂. Which two of these reactions are most likely to occur when concentrated brine is electrolysed ?

MCQ (Single)Products of Electrolysis

The products of the electrolysis of aqueous NaCl are :

MCQ (Single)Products of Electrolysis

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Account for the following:

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Write the anode and cathode reactions and the overall cell reaction occurring in a lead storage battery during its use.

TextNernst Equation for Cell PotentialVariation of Molar Conductivity with ConcentrationProducts of ElectrolysisLead Storage Battery and Its Working

Calculate the potential for half-cell containing 0.01 M K₂Cr₂O₇(aq), 0.01 M Cr³⁺(aq) and 1.0 × 10⁻⁴ M H⁺(aq). The half cell reaction is: Cr₂O₇²⁻(aq) + 14H⁺(aq) + 6e⁻ → 2Cr³⁺(aq) + 7H₂O(l) and the standard electrode potential is given as E° = 1.33 V. [Given : log 10 = 1]

TextNernst Equation for Cell PotentialVariation of Molar Conductivity with ConcentrationProducts of ElectrolysisLead Storage Battery and Its Working