AP EAMCET · Chemistry · Classification of Elements and Periodicity in Properties
Find the correct order of the given elements with respect to their size
- A \(\mathrm{Zn}>\mathrm{Fe}>\mathrm{Fe}^{2+}>\mathrm{Fe}^{3+}\)
- B \(\mathrm{Fe}^{2+}>\mathrm{Fe}^{2+}>\mathrm{Zn}>\mathrm{Fe}\)
- C \(\mathrm{Fe}>\mathrm{Fe}^{2+}>\mathrm{Fe}^{3+}>\mathrm{Zn}\)
- D \(\mathrm{Zn}>\mathrm{Fe}^{3+}>\mathrm{Fe}^{2+}>\mathrm{Fe}\)
Answer & Solution
Correct Answer
(A) \(\mathrm{Zn}>\mathrm{Fe}>\mathrm{Fe}^{2+}>\mathrm{Fe}^{3+}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{Zn}\) atomic radii is \(137 \mathrm{pm}\) \(\mathrm{Fe}\) atomic radii is \(126 \mathrm{pm}\) \(\mathrm{Fe}^{3+}\) ionic radius is \(63 \mathrm{pm}\), \(\mathrm{Fe}^{2+}\) has an ionic radius of \(77 \mathrm{pm}\). Thus, the correct order of their size is…
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