Assertion: Sodium metal can be extracted by electrolysis of aqueous NaCl solution, using inert electrodes (Pt electrode).
Reason: H2 is produced at cathode.
Answer & explanation
Correct answer: option 4
Aqueous NaCl solution using Pt electrodes
NaCl ⇔ Na+ + Cl-
H2O ⇔ H+ + OH-
At anode: 2Cl- → Cl2 + 2e-
At cathode: 2H+ + 2e- → H2
Na+ interacts with OH- to form NaOH. So, pH of solution increases during electrolysis.