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JEE Main 20236 AprilMorning Shift

Exam: JEE Main
Year: 2023
Date: 6 April
Shift: Morning Shift
Subject: Chemistry
Chapter: Redox Reactions

JEE Main 2023 · 6 April · Morning Shift · Chemistry · Redox Reactions

Strong reducing and oxidizing agents among the following ,...

Strong reducing and oxidizing agents among the following , respectively, are

Options

A
${Ce}^{3 +}$ and ${Ce}^{4 +}$
B ${Ce}^{4 +}$ and ${Tb}^{4 +}$
C ${Ce}^{4 +}$ and ${Eu}^{2 +}$
D ${Eu}^{2 +}$ and ${Ce}^{4 +}$

Correct answer

D. ${Eu}^{2 +}$ and ${Ce}^{4 +}$

Step-by-step solution

${E}_{{Ce}^{4 +} / {Ce}^{3 +}} = + 1 . 74V$
Lanthanoids have $+ 3$ oxidation state as stable oxidation state. Hence, in their $+ 4$ oxidation state, they act as an oxidising agents and $+ 2$ oxidation state, they act as reducing agents.

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