MHT CET2019Morning ShiftChemistryElectrochemistryActual
Which among the following is correct for electrolysis of brine solution?
Options
- AO 2 gas is liberated at cathode
- BSodium metal is collected at anode
- CH 2 gas is liberated at cathode
- DC l 2 gas is liberated at cathode
Correct answer
C. H 2 gas is liberated at cathode
Step-by-step solution
In electrolysis of brine solution, H 2 gas is liberated at cathode. The solution contains four ions N a + , C l θ , H + and O θ H ions. There occurs a race amongst them for their discharge at their respective electrodes. Following electrode reactions are possible: C a t h o d e 2 H 2 O l + 2 e - → H 2 g + 2 O - H a q A n o d e 2 C l - a q → C l 2 g + 2 e - In this electrolysis, H 2 at cathode and C l 2 at anode are given off.