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NEET2009Chemistrys Block ElementsActual

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

Options

  1. AMCl > MI > MBr > MF
  2. BMF > MCl > MBr > MI
  3. CMF > MCl > MI > MBr
  4. DMI > MBr > MCl > MF

Correct answer

D. MI > MBr > MCl > MF

Step-by-step solution

Key Idea According to Fajan's rule, Covalent character 1 size of cation In the given options, cation is same but anions are different. Among halogens the order of size is F MBr > MCl > MF

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