Question

The pH value increases with:

• A. increase in hydrogen ion concentration
• B. decrease in hydrogen ion concentration
• C. no change in hydrogen ion concentration
• D. none of the above

Answer 1

Answer: (B)

decrease in hydrogen ion concentration

$pH$ is the scale used to determine the concentration of hydrogen ions in the solution. The scale ranges from $0-14$ with $7$ being the neutral value. Less than $7$ is acidic and more than $7$ is basic. Hence, the $pH$ value increases with a decrease in hydrogen ion concentration as the solution becomes basic.

Hence, option B is correct.