Question

Which of the following exists ?

• A. $Mn{F}_7$
• B. $K_2\left[Cu{I}_4\right]$
• C. $Mn{O}_{3}F$
• D. All of these

Answer 1

Answer: (C)

$Mn$ has tendency to form
Fluorine is highly electronegative. Therefore, fluorine atom has a strong tendency to attract electrons. seven fluorine does not create a crowd surrounding the manganese atoms. Hence $Mn{F}_7$ is not stable.
As ${\text{I}}^{-}$ is a stronger reducing agent, i.e. reductant, and reduces ${\text{Cu}}^{2+}$ into $Cul$ and Itself is oxidized into $I_2$ ​. Therefore, $[Cu{I}_4{]}^{2-}$ does not.
$Mn{O}_{3}F$ in $M{n}^{+7}$ and less crowded surrounding cental metal hence, it is stable.