Faraday's laws

13 questions on Faraday's laws from the Electrochemistry chapter: 2 NEET level, 8 JEE Main, 3 JEE Advanced. Each one opens with its answer and solution.

• Two electrolytic cells containing AgNO3 and AuCl3 solutions are connected in series. When 2.158 g of silver is deposited in the first cell, the mass of gold dep... JEE Main level
• Acidified water is electrolysed with inert electrodes and 2 faraday of charge is passed. The total volume of gas collected at STP (molar volume 22.4 L) is JEE Main level
• The same quantity of electricity is passed through aqueous AgNO3, aqueous CuSO4 and molten AlCl3 connected in series. The ratio of the number of moles of Ag, Cu... NEET level
• The electrochemical equivalent of a trivalent metal is 9.33x 10^-5 g C^-1. Taking F = 96500 C mol^-1, the molar mass of the metal is approximately JEE Main level
• Chromium is plated from a solution containing Cr^3+ using a current of 1.25 A. Find the time in minutes (nearest integer) needed to deposit 1.50 g of chromium a... JEE Main level
• Acidified water is electrolysed with platinum electrodes at a steady current of 5.00 A for 1.00 h. The mass of water decomposed is (take F = 96500 C mol^-1) JEE Main level
• Molten MgCl2 is electrolysed and 2.40 g of magnesium is obtained at the cathode. The volume of chlorine gas liberated at the anode, measured at STP, is (Mg = 24... NEET level
• Acidified water is electrolysed with platinum electrodes at a steady current of 2.00 A. The dry oxygen collected at the anode occupies 492 mL at 300 K and 0.960... JEE Advanced level
• A current of 0.500 A is passed for 32 min 10 s through aqueous AgNO3 with platinum electrodes. Take F = 96500 C mol^-1, N_A = 6.02x 10^23, Ag = 108, Cu = 63.5, ... JEE Advanced level
• In an experiment to determine Avogadro's number, a charge of 965 C passed through aqueous CuSO4 deposits 0.3175 g of copper at the cathode. Taking the electroni... JEE Advanced level
• The time (in s, nearest integer) needed to deposit 1.00 g of aluminium from molten Al2O3 with a current of 10.0 A at 100% efficiency is. (Al = 27) JEE Main level
• Acidified water is electrolysed for 1.00 hour at a steady current of 0.600 A. The volume of oxygen produced at STP (22.4 L mol^-1), in mL (nearest integer), is. JEE Main level
• A current of 5.00 A is passed through CuSO4 solution for 3860 s with a current efficiency of 80%. The mass of copper deposited (in g, two decimals) is. (Cu = 63... JEE Main level