NEET Chemistry pH & Buffer Solutions MCQ Question
Which of the following statements about buffer solutions and pH is correct?
The pH of a buffer solution is equal to the pK a when the concentrations of the acid and its conjugate base are equal.
Buffer solutions can only be made using strong acids and their conjugate bases.
The pH of pure water is always greater than 7 at 25 °C.
Adding a strong acid to a buffer solution will increase its pH significantly.
Correct Answer
Detailed Explanation
The statement in option A reflects the principle that if the concentrations of the acid and its conjugate base are equal, the pH of the buffer solution will equal the pK a, as stated in the NCERT context on buffer solutions. Other options present misconceptions about the nature of buffer solutions and pH.
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