Alizarin gives a red colour by mordanting it with the sulphate of a metal. The metal ion involved is

Alizarin gives a red colour by mordanting it with the sulphate of a me

1.	Alizarin gives a red colour by mordanting it with the sulphate of a metal. The metal ion involved is
A.	\[C{{r}^{3+}}\]
B.	\[F{{e}^{3+}}\]
C.	\[A{{l}^{3+}}\]
D.	\[S{{n}^{2+}}\]
Answer» D. \[S{{n}^{2+}}\]