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Chemistry
Chemistry
Problem
Which of the following cations will turn a borax bead green in an oxidising flame? a.
Fe
2
+
\text{Fe}^{2+}
Fe
2
+
b.
Mn
2
+
\text{Mn}^{2+}
Mn
2
+
c.
Cr
3
+
\text{Cr}^{3+}
Cr
3
+
d.
Cu
2
+
\text{Cu}^{2+}
Cu
2
+
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