Question

Limit test for iron purple colour is due to

Answer 1

Answer:

Limit test of Iron is based on the reaction of iron in ammonical solution with thioglycollic acid in presence of citric acid to form iron thioglycolate which is pale pink to deep reddish purple in color.

Explanation:

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Answer 2

The limit test of Iron is based on the reaction of iron in ammonical solution with thioglycolic acid in presence of citric acid to form iron thioglycolate which is pale pink to deep reddish-purple in color. The limit test for iron purple color is due to the presence of iron thioglycolate.