MHT CET20243 May 2024Morning ShiftChemistryElectrochemistryActual
Calculate the amount of electricity required to convert 1.1 mol of Cr ₂ O ₇²⁻ to Cr ⁺³ in acidic medium.
Options
- A6.369 10^5 C
- B1.462 10^5 C
- C4.839 10^5 C
- D3.419 10^5 C
Correct answer
A. 6.369 10^5 C
Step-by-step solution
14 H ⁺+ Cr ₂ O ₇²⁻+6 e ⁻ 2 Cr ³⁻+7 H ₂ O 1 mole of Cr ₂ O ₇²⁻ gets reduced by 6 moles of electrons to give 2 moles of Cr ³⁺ . array ll & 1.1 mole of Cr ₂ O ₇ ²⁻=6 1.1=6.6 moles of e ⁻ & 1 mole of electrons =96500 C of electricity & 6.6 moles of electrons & =6.6 96500 C =6.369 10^5 C array