See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

2 24 Mg 2 12 2 Mg e Mg E g             Charge required for the deposition of 12gMg=1F Charge required for the deposition of 1 1g Mg= F 12  cost for charge=Rs.5 12 F 3+ - Al 27 Al +3e Al E = =9g 3        Charge required for 9 1 g F  Charge required for 30 10 30 9 3 F g F   Cost for 10 10 charge=5 12 3 3 F F   .200 Rs 