Biotechnology Engineering (M.Phil./Ph.D.) 2014 Panjab University Entrance Exam With Answers

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26.

In order to calibrate pH meter with glass electrodes which of the following standards are used ?

A: PH 0.1
B: pH 4.008
C: pH 14.001
D: pH 0.1,4.008 and 14.001

The answer is: B

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