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Which compound is used in Ultra-violet calibration?

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in Chemistry – Class 12 by (188k points)
Which compound is used in Ultra-violet calibration?

(a) Hg2Cl2

(b) HgCl2

(c) K2Cr2O7

(d) KMnO4

The question was posed to me in an interview for internship.

The origin of the question is D and F-Block Elements in division D and F-Block Elements of Chemistry – Class 12

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Right answer is (c) K2Cr2O7

To explain: Potassium dichromate (K2Cr2O7) is especially useful in the visible range but also useful in UV. Potassium dichromate itself is stable and available in high purity. In dilute perchloric acid solution, it has a linear response with good temperature stability and also stable as solution.

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