Arrange the following in increasing order of ionic radii? $\mathrm{C}^{4-}, \mathrm{N}^{3-}, \mathrm{F}^{-},…

Arrange the following in increasing order of ionic radii? $\mathrm{C}^{4-}, \mathrm{N}^{3-}, \mathrm{F}^{-}, \mathrm{O}^{2-}$
  1. $\mathrm{C}^{4-} < \mathrm{N}^{3-} < \mathrm{O}^{2-} < \mathrm{F}^{-}$
  2. $\mathrm{N}^{3-} < \mathrm{C}^{4-} < \mathrm{O}^{2-} < \mathrm{F}^{-}$
  3. $\mathrm{F}^{-} < \mathrm{O}^{2-} < \mathrm{N}^{3-} < \mathrm{C}^{4-}$
  4. $\mathrm{O}^{2-} < \mathrm{F}^{-} < \mathrm{N}^{3-} < \mathrm{C}^{4-}$

Solution

All the given species are isoelectronic. In case of isoelectronic species ionic radii increases with increase in negative charge on anions.

Asked in: JEE-TOPICTESTS-CHEMISTRY

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