(A) According to Fajan's rule,the polarizability of an anion depends on its size. Larger anions are more polarizable because the valence electrons are

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$I^{-} > Br^{-} > Cl^{-} > F^{-}$

(A) According to Fajan's rule,the polarizability of an anion depends on its size. Larger anions are more polarizable because the valence electrons are further from the nucleus and are held less tightly. As we move down the group in the periodic table,the size of the halide ions increases in the order $F^{-} Br^{-} > Cl^{-} > F^{-}$.

Class 11 Chemistry Chemical Bonding and Molecular Structure Polarisation and Fajan’s rule

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The correct order of polarizability for the given halide ions is:

A
$I^{-} > Br^{-} > Cl^{-} > F^{-}$
B
$I^{-} > Br^{-} = Cl^{-} > F^{-}$
C
$I^{-} = Br^{-} = Cl^{-} > F^{-}$
D
$I^{-} = Br^{-} < Cl^{-} = F^{-}$

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Chemical Bonding and Molecular Structure

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Polarisation and Fajan’s rule

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R.$
Assertion $A :$ Lithium halides are somewhat covalent in nature.
Reason $R :$ Lithium possesses high polarization capability.
In the light of the above statements,choose the most appropriate answer from the options given below:

DifficultJEE MAIN 2021

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Assertion $(A)$: $LiCl$ and $MgCl_2$ are soluble in ethanol.
Reason $(R)$: Lithium and magnesium are harder than their respective group elements.

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Assertion : $LiCl$ is predominantly a covalent compound.
Reason : Electronegativity difference between $Li$ and $Cl$ is too small.

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Which of the following compounds is the least ionic?

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The melting point of $FeCl_3$ and $FeCl_2$ is:

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The correct order of polarizability for the given halide ions is:

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