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D and F Block Elements question

2002 · Shift 0 · Q22

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D and F Block Elements
2002 · Shift 0 · Q22

D and F Block Elements question

2002 · Shift 0 · Q22

JEE MainChemistryD and F Block ElementsMCQ+4 / −1

How do we differentiate between

Fe^{3+}

and

Cr^{3+}

in group III?

A
by taking excess of $NH_4OH$ solution
B
by increasing $NH_4^+$ ion concentration
C
by decreasing $OH^-$ ion concentration
D
both (b) and (c)

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