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Covalent Bond vs Ionic Bond

Which of the ...

Question

Which of the following compounds is colored?

A

H g I_{2}

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B

A g C l

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C

N a C l

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D

H g C l_{2}

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Solution

The correct option is A $H g I_{2}$
$H g I_{2}$ is red colored. The color is due to the polarisation of $I^{-}$ by $H g^{2 +}$ .
$A g C l$ is colorless since $C l^{-}$ is small and cannot be polarsized by $A g^{+}$ . $N a C l$ and $H g C l_{2}$ are colorless for the same reason.

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Covalent Bond vs Ionic Bond

Standard XIII Chemistry

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