AIEEE 2002 Chemistry Solved Paper

Section: Chemistry

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Question : 67 of 76

Marks: +1, -0

How do we differentiate between Fe3+ and Cr3+ in group III?

[AIEEE 2002]

by taking excess of NH4‌OH solution
by increasing NH4+ion concentration
by decreasing OH−ion concentration
both (b) and (c)

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