JEE Advanced 2020 Full Test 1 Paper 1

2L of a butter solution is prepared that is 1MNaH2PO4 and 1MNa2HPO4. The solution is divided into two halves between two compartment of an of an electrolyte cell using Pt-electrodes. Assume that the only reaction is the electrolysis of water. If the electrolysis is carried out for 212 min with a current of 1.25 A. pH of the anode compartment is approximately
[ Pka (H2PO4−)=7.1]