Electrolysis and products at electrodes

8 questions on Electrolysis and products at electrodes from the Electrochemistry chapter: 1 NEET level, 4 JEE Main, 3 JEE Advanced. Each one opens with its answer and solution.

• Molten NaCl and a concentrated aqueous solution of NaCl are electrolysed separately using inert electrodes. The cathode products are respectively NEET level
• In the electrolytic refining of copper, an impure copper block (containing Zn, Fe, Ag and Au) is the anode, a thin pure copper sheet is the cathode and the elec... JEE Main level
• Aqueous Na2SO4 is electrolysed between platinum electrodes. A few drops of litmus are present in the solution. Which observation is correct? JEE Main level
• 100 mL of aqueous NaCl (concentrated) is electrolysed between platinum electrodes with a current of 0.965 A for 200 s. Assume all the chlorine escapes as gas wi... JEE Main level
• Aqueous AgNO3 is electrolysed. Which of the following statements are correct? JEE Main level
• 250 mL of 0.50 M CuSO4 is electrolysed between platinum electrodes with a current of 1.50 A for 3860 s. Assume complete dissociation of the acid formed, no chan... JEE Advanced level
• 100 mL of 0.10 M CuSO4 is electrolysed between platinum electrodes with a steady current of 0.50 A. Take F = 96500 C mol^-1 and neglect volume changes. Which st... JEE Advanced level
• A solution contains 0.10 mol AgNO3 and 0.10 mol Cu(NO3)2. It is electrolysed between platinum electrodes and 0.25 F of charge is passed. Given E deg(Ag+/Ag) = 0... JEE Advanced level