NEET Chemistry The s-Block Elements Questions Solved

NEET - 2009

In the case of alkali metals, the covalent character decreases in the order

(a) MCl>MI>MBr>MF

(b) MF>MCl>MBr>MI

(c) MF>MCl>MI>MBr

(d) MI>MBr>MCl>MF

Key Idea According to Fajan's rule,

 Covalent character  1/size of cation size of anion

In the given options, cation is same but anions are different. Among halogens the order of size is

   F<Cl<Br<I

... Order of covalent character is

     MI>MBr>MCl>MF

Difficulty Level:

  • 8%
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  • 48%
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