Which of the following is the simplest of pH meters?
A. Null-detector type pH meter
B. Direct reading type pH meter
C. Digital pH meter
D. Modern pH meter
Answer:A
Which of the following is the simplest of pH meters?
A. Null-detector type pH meter B. Direct reading type pH meter C. Digital pH meter D. Modern pH meter
Explanation: Null-detector type pH meter is the simplest of all pH meters. It is also known as the potentiometer type.