The pH of a solution prepared by mixing 2.0 mL of HCI solution of pH 3.0 and 3.0 mL of NaOH of pH 10.0 is

The pH of the solution obtained by mixing 100 mL of a solution of pH = 3 with 400 mL of a solution of pH = 4 is

The pH of the solution obtained by mixing 100 mL of a solution of pH = 3 with 400 mL of a solution of pH = 4 is :

The pH of the solution obtained by mixing 100 mL of a solution of pH=3 with 400 mL of a solution of pH=4 is

Find the pH of a solution prepared by mixing 25ml of a 0.5M solution of HCI,10ml of a 0.5M solution of NaOH and 15 ml of water :-