JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
The correct order of ionic radii for the ions, \(\mathrm{P}^{3-}, \mathrm{S}^{2-}\) \(\mathrm{Ca}^{2+}, \mathrm{K}^{+}, \mathrm{Cl}^{-}\)is :
- A \(\mathrm{P}^{3-}>\mathrm{S}^{2-}>\mathrm{Cl}^{-}>\mathrm{K}^{+}>\mathrm{Ca}^{2+}\)
- B \(\mathrm{Cl}^{-}>\mathrm{S}^{2-}>\mathrm{P}^{3-}>\mathrm{Ca}^{2+}>\mathrm{K}^{+}\)
- C \(\mathrm{P}^{3-}>\mathrm{S}^{2-}>\mathrm{Cl}^{-}>\mathrm{Ca}^{2+}>\mathrm{K}^{+}\)
- D \(\mathrm{K}^{+}>\mathrm{Ca}^{2+}>\mathrm{P}^{3-}>\mathrm{S}^{2-}>\mathrm{Cl}^{-}\)
Answer & Solution
Correct Answer
(A) \(\mathrm{P}^{3-}>\mathrm{S}^{2-}>\mathrm{Cl}^{-}>\mathrm{K}^{+}>\mathrm{Ca}^{2+}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{P}^{3-}>\mathrm{S}^{2-}>\mathrm{Cl}^{-}>\mathrm{K}^{+}>\mathrm{Ca}^{2+}\) (Correct order of ionic radii) all the given species are isoelectronic species. In isoelectronic species size increases with increase of negative charge and size decreases with increase in…
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