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Which of the following is the largest is size?
Which of the following is the largest is size?
Updated On: Jun 6, 2024
- $ Cl^{-} $
- $ S^{2-} $
- $ Na^{+} $
- $ F^{-} $
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The Correct Option is B
Solution and Explanation
$C l^{-}$and $S^{2-}$ are isoelectronic species (containing equal number of electrons, i.e., $18$). Their radii would be different because of their different nuclear charge. Anion with the greater negative charge will have the larger radius hence $S^{2-}$ has larger size than $C l^{-}$. For isoelectronic species, radii $\propto \frac{1}{Z}$ Further $Na ^{+}$and $F ^{-}$ are also isoelectronic species but they have $10$ electrons. Hence, their sizes are smaller than $S ^{2-}$ ion.
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Concepts Used:
Haloalkanes and Haloarenes - Classification
Classification of Haloalkanes and Haloarenes are as follows:
Haloalkanes and Haloarenes are Classified on the Basis of the Number of Halogen Atoms:
These are further classified as mono, di, or polyhalogen (tri-,tetra-, etc.) compounds depending on whether they contain one, two or more halogen atoms in their structures. For example;
- Monohaloalkane
- Dihaloalkane
- Trihaloalkane
Haloalkanes and Haloarenes are Classified on Compounds Containing sp3 C—X Bond (X= F, Cl, Br, I)
This class includes:
- Alkyl halides or haloalkanes (R—X)
- Allylic halides
- Benzylic halides
Haloalkanes and Haloarenes are Classified on Compounds Containing sp2 C—X Bond
This class includes:
- Vinylic halides
- Aryl halides
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