Which combination will give the strongest covalent bond?

K^{+}

and

C l^{-}

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K^{+}

and

O^{2 -}

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C a^{2 +}

and

C l^{-}

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C a^{2 +}

and

O^{2 -}

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Solution

The correct option is C $C a^{2 +}$ and $C l^{-}$
According to Fajan's Rule, small cation, large anion and high charge value will give a stronger covalent bond. The smallest cation with more charge value is $C a^{+ 2}$ and large anion is $C l^{-}$ . The compound is $C a C l_{2}$ .

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Similar questions

The correct order of ionic size of the species $K^{+}, C l^{-}, C a^{2 +}$ and $S^{2 -}$ is:

S^{2 -}, K^{+}, C a^{2 +}, C l^{-}

K^{+}, C l^{-}, S^{2 -}, C a^{2 +}

F, L i, M g, K

{C a}^{2 +}, K^{+}, {C l}^{-}, S^{2 -}

F < L i < M g < K

{C a}^{2 +} < K^{+} < {C l}^{-} < S^{2 -}

\begin{matrix} C l^{-}, A r, K^{+}, O^{2 -}, M g^{2 +}, F^{-} \end{matrix}

C a^{2 +}

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