MCQ
The maximum and minimum melting point of first and second transition series elements respectively are obtained with
- A$Cr$ and $Zn$
- B$Cr$ and $Hg$
- ✓$Cr$ and $Cd$
- D$Mo$ and $Cd$
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In the above chemical reaction, intermediate $"X"$ and reagent/condition $"A"$ are

|
List $I$ (Conversion) |
List $II$ (Number of Faraday required) |
| $A$. $1 \mathrm{~mol}$ of $\mathrm{H}_2 \mathrm{O}$ to $\mathrm{O}_2$ | $l$. $3 \mathrm{~F}$ |
| $B$. $1 \mathrm{~mol}$ of $\mathrm{MnO}_4^{-}$to $\mathrm{Mn}^{2+}$ | $II$. $2 F$ |
| $C$. $1.5 \mathrm{~mol}$ of $\mathrm{Ca}$ from molten $\mathrm{CaCl}_2$ | $III$. $1F$ |
| $D$. $1 \mathrm{~mol}$ of $\mathrm{FeO}$ to $\mathrm{Fe}_2 \mathrm{O}_3$ | $IV$. $5 \mathrm{~F}$ |
Choose the correct answer from the options given below:
Which forms di-iodide on reaction with $HI $ (excess) ?