NEETAnalytical ChemistryHard
Question
Which one of the following metal salts produces a blue coloured bead in cobalt nitrate charcoal cavity test ?
Options
A.Zn2+
B.Mg2+
C.Sn2+
D.Al3+
Solution
Al2O3.CoO formed in the test is blue in colour. It is called as thenard′s blue.
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