Which of the following instruments is used to measure the pH of a solution?
A. Refractometer
B. pH meter
C. Spectrophotometer
D. Colorimeter
Answer:B
Which of the following instruments is used to measure the pH of a solution?
A. Refractometer B. pH meter C. Spectrophotometer D. Colorimeter
Explanation: A pH meter is an instrument used to measure the pH of a solution, which indicates its acidity or alkalinity.