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Dipole Moment

which is more...

Question

which is more covalent and why (BeCl2 or LiCl) ?

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Solution

BeCl₂ is more covalent than LiCl.
According to Fajan's rule more the polarisation, more will be the covalent character.
$P o l a r i s a t i o n α \frac{1}{C h a r g e o f c a t i o n} T h a t i s s m a l l e r t h e s i z e, m o r e w i l l b e t h e p o l a r i s a t i o n . T h e n m o r e w i l l b e t h e c o v a l e n t c h a r a c t e r . A m o n g L i^{+} a n d B e^{2 +}, B e^{2 +} s i z e i s s m a l l . S o i t s h a v i n g h i g h p o l a r i s a t i o n a n d m o r e c o v a l e n t c h a r a c t e r .$

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