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  4. The order of decreasing polarity in the compounds CaO, CsF, KCl, MgO is

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Q. The order of decreasing polarity in the compounds $CaO,\,CsF,\,KCl,\,MgO$ is

Punjab PMETPunjab PMET 2011The s-Block Elements

Solution:

According to Fajans rule polarity increases as the size of the cation increases. Thus, the order of polarity is $ CsF>KCl>CaO>MgO $