MCQ
Which element exist in free state mainly
- A$Hg$
- B$Fe$
- ✓$Au$
- D$Zn$
Metals that are least reactive exist in free state in nature.
Some of the elements that are found in free state in nature are Gold$(Au)$,Platinum( $Pt )$, Silver$(Ag)$,etc.
Therefore, $\operatorname{Gold}( Au )$ is a metal that is found in free state in nature.
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Acidified $K _2 Cr _2 O _7$, alkaline $KMnO _4, CuSO _4, H _2 O _2, Cl _2, O _3, FeCl _3, HNO _3$ and $Na _2 S _2 O _3$. The total number of reagents that can oxidise aqueous iodide to iodine is