Electrochemistry | JEE Advanced 2025 PYQ |

In an electrochemical cell, dichromate ions in an aqueous acidic medium are reduced to Cr3+. The current (in amperes) that flows through the cell for 48.25 minutes to produce 1 mole of Cr³⁺ is
Use: 1 Faraday = 96500 C mol⁻¹

An electrochemical cell is fueled by the combustion of butane at 1 bar and 298 K. Its cell potential
X/F x 103 is volts, where F is the Faraday constant. The value of X is __
Use: Standard Gibbs energies of formation at 298 K are: ΔfGCO₂ = -394 kJ mol⁻¹; ΔfG0water =
-237 kJ mol⁻¹; ΔG0butane = -18 kJ mol⁻¹

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