JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
Which of the following acts as a strong reducing agent? (Atomic number : \(\mathrm{Ce}=58, \mathrm{Eu}=63\), \(\mathrm{Gd}=64, \mathrm{Lu}=71)\)
- A \(\mathrm{Lu}^{3+}\)
- B \(\mathrm{Gd}^{3+}\)
- C \(\mathrm{Eu}^{2+}\)
- D \(\mathrm{Ce}^{4+}\)
Answer & Solution
Correct Answer
(C) \(\mathrm{Eu}^{2+}\)
Step-by-step Solution
Detailed explanation
\(\begin{array}{ll}\mathrm{Eu}^{+2} & \mathrm{Eu}^{+3}+1 \mathrm{e}^{-} \\{[\mathrm{Xe}] 4 \mathrm{f}^7 6 \mathrm{~s}^0} \rightarrow & {[\mathrm{Xe}] 4 \mathrm{f}^6 6 \mathrm{~s}^0}\end{array}\)
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