Which of the following substances are blue? | Qualitative and Quantitative Analysis — Chem-Mantra | Chem-Mantra

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Question

Which of the following substances are blue?

Answer: B,C,D

💡 Solution & Explanation

CoAl2O4 (Thenard's blue), Co(BO2)2 (cobalt borax bead), and NaCoPO4 (cobalt microcosmic bead) are blue. Fe(BO2)2 is generally yellow/green.

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