নিচের কোনটি সঠিক নয়?

নিচের কোনটি সঠিক নয়?

A The pH of a 10^-2 M HCl solution is 2

B The pH of 0.01M Na₂CO₃ solution is higher than 7

C The pH of a 0.01M NaOH is 12

D The pH of a 10^-9 M HCl solution is 9

Solution

Correct Answer: Option D