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Transition and Inner Transition Elements — Chemistry STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12ChemistryTransition and Inner Transition Elements2 Marks
Question
Which metal is used to reduce $Cr ^{3+}$ ion? Why?
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Answer

A stable $Cr ^{3+}$ ion, strong reducing agent which has high negative value for reduction potential like metallic zinc $\left(E^{\circ}=\right.$ -0.76 V ) is required. Metallic zinc is a powerful reducing agent due to its large negative values.

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