Will mark brainliest 4 A solution which has a pH of 11:
A is more alkaline than a solution with a pH of 12.

B is less alkaline than a solution with a pH of 9

C is more acidic than water

D is less alkaline than a sodium hydroxide solution of the same concentration.​

D

Explanation:

A, B and C are incorrect since the greater the pH value, the more alkaline a solution is, and the pH of water is 7.

In the statement D, the pH of NaOH solution is 13 usually, so the given solution is less alkaline than NaOH solution, and I think of the same concentration is somewhat unnecessary.

the answer is definitely c.