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#	Question	Subject and topic	Difficulty
2021	What is the role of a salt bridge in a galvanic cell?	Chemistry Galvanic cells and electrode potential	Easy
2022	Given E°(Zn²⁺/Zn) = −0.76 V and E°(Cu²⁺/Cu) = +0.34 V, what is the standard EMF of the Daniell cell?	Chemistry Galvanic cells and electrode potential	Medium
2023	E°(Ag⁺/Ag) = +0.80 V and E°(Cu²⁺/Cu) = +0.34 V. What happens when a copper strip is dipped into silver nitrat…	Chemistry Galvanic cells and electrode potential	Medium
2024	Which of these is the strongest reducing agent, given E° values Li⁺/Li = −3.05 V, Na⁺/Na = −2.71 V, Mg²⁺/Mg =…	Chemistry Galvanic cells and electrode potential	Hard
2025	Which relation correctly links the standard Gibbs energy change with the standard cell EMF?	Chemistry Nernst equation	Easy
2026	What is the electrode potential of a hydrogen electrode in a solution of pH 1 at 298 K, with H₂ at 1 bar?	Chemistry Nernst equation	Easy
2027	Calculate ΔG° for the Daniell cell (E°cell = 1.10 V, n = 2, F = 96500 C mol⁻¹).	Chemistry Nernst equation	Medium
2028	For the cell Zn \| Zn²⁺(0.1 M) \|\| Cu²⁺(1 M) \| Cu at 298 K, with E°cell = 1.10 V, what is E_cell?	Chemistry Nernst equation	Hard
2029	A cell reaction involves 2 electrons and has E°cell = 0.2955 V at 298 K. What is its equilibrium constant?	Chemistry Nernst equation	Medium
2030	How do conductivity (κ) and molar conductivity (Λm) of an electrolyte solution change on dilution?	Chemistry Conductance of electrolytic solutions	Easy
2031	The resistance of a conductivity cell filled with 0.1 M KCl (κ = 0.0129 S cm⁻¹) is 100 Ω. What is the cell co…	Chemistry Conductance of electrolytic solutions	Medium
2032	A 0.1 M solution has conductivity 0.012 S cm⁻¹. What is its molar conductivity?	Chemistry Conductance of electrolytic solutions	Easy
2033	Given Λ°(CH₃COONa) = 91.0, Λ°(HCl) = 426.2 and Λ°(NaCl) = 126.5 S cm² mol⁻¹, what is Λ° for CH₃COOH?	Chemistry Conductance of electrolytic solutions	Medium
2034	At a certain concentration, acetic acid has Λm = 39.07 S cm² mol⁻¹ and Λ°m = 390.7 S cm² mol⁻¹. What is its d…	Chemistry Conductance of electrolytic solutions	Hard
2035	Which product forms at the cathode during electrolysis of aqueous sodium chloride with inert electrodes?	Chemistry Electrolysis	Easy
2036	How many faradays are needed to deposit 1 mol of aluminium from Al³⁺ ions?	Chemistry Electrolysis	Easy
2037	A current of 2 A is passed through CuSO₄ solution for 965 s. What mass of copper is deposited? (Cu = 63.5 g m…	Chemistry Electrolysis	Medium
2038	The same quantity of electricity that deposits 0.635 g of copper from Cu²⁺ is passed through AgNO₃ solution. …	Chemistry Electrolysis	Hard
2039	What happens at the anode when aqueous copper sulphate is electrolysed using copper electrodes?	Chemistry Electrolysis	Medium
2040	Which of these is a secondary (rechargeable) battery?	Chemistry Batteries, fuel cells and corrosion	Easy