100 ml of `pH=4` solution is mixed with 100 ml of `pH=6` solution. What is the pH of resulting solution?

25 mL (M/10) HCl solution is mixed with 50 mL 2/25(M)KOH solution. What will be the pH of the resulting solution?

20 mL 3(N) HCl solution is mixed with 15 mL 4(N)NaOH solution. What will be the pH of the resulting solution?

200 mL HCl solution is mixed with 300 mL NaOH solution. What will be the pH of the mixed solution if pH values of HCl and NaOH solutions are 2 and 12 respectively?

When 100 ml of M/10 NaOH solution and 50 ml of M/5 HCI solution are mixed, the pH of resulting solution would be

When 100 ml of M/10 NaOH solution and 50 ml of M/5 HCI solution are mixed, the pH of resulting solution would be