Chemistry In Everyday Life Question 35

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

Options:

A) $ C{r^{3+}} $

B) $ F{e^{3+}} $

C) $ A{l^{3+}} $

D) $ S{n^{2+}} $

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Answer:

Correct Answer: C

Solution:

“Alizarin” is a typical mordant dye gives different colours depending on the metal ion used, for example with $ A{l^{+3}} $ , alizarin gives a rose red colour. Co-ordination compound of alizarin with $ A{l^{+3}} $ as follow