Which of the following reactions is/are relevant to the microcosmic bead test?

CHEMISTRY · Single correct · CBSE · Chemistry · Organic Chemistry - Some Basic Principles and Techniques · Organic Chemistry - Some Basic Principles and Techniques

Problem

Which of the following reactions is/are relevant to the microcosmic bead test? (1) Na(NH4)HPO4⋅4H2O→NaPO3+NH3+5H2O\text{Na}(\text{NH}_4)\text{HPO}_4 \cdot 4\text{H}_2\text{O} \rightarrow \text{NaPO}_3 + \text{NH}_3 + 5\text{H}_2\text{O} (2) CoO+NaPO3→NaCoPO4\text{CoO} + \text{NaPO}_3 \rightarrow \text{NaCoPO}_4 (3) CuO+NaPO3→NaCuPO4\text{CuO} + \text{NaPO}_3 \rightarrow \text{NaCuPO}_4 (4) All of these

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