Question

Which of the following is a primary standard used in the calibration of spectrophotometers?

• A. Sodium dichromate
• B. Sodium chloride
• C. Potassium dichromate
• D. Potassium chloride

Hint:

Primary standards like potassium dichromate offer high purity and stability, ideal for calibration purposes in spectrophotometry.

Answer 1

The Correct Option is C

Potassium dichromate is a commonly used primary standard for calibrating UV-Vis spectrophotometers because it exhibits stable absorbance peaks at specific wavelengths, making it reliable for validation.