Q10 / 150 · MHT CET 2021 (21 Sep Shift 1) · Chemistry

Identify metal halide from following having highest ionic character? $(M=$ metal atom $)$

  • Correct answer
    A
    $\mathrm{MF}$
  • B
    $\mathrm{MBr}$
  • C
    $\mathrm{MI}$
  • D
    $\mathrm{MCl}$

Solution

According to fajan's rule as the size of anion increases its ionic character will decrease. Since the size of $\mathrm{F}^{-}$is the lowest among halides hence MF has the highest ionic character. Order of ionic character: $$ \mathrm{MF}>\mathrm{MCl}>\mathrm{MBr}>\mathrm{MI} $$

Hence, the correct answer is option: 'A'.

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