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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($1$) The value of $x$ is. . . . .
($2$) The value of $y$ is. . . . .
$\mathrm{Li}_{2} \mathrm{O}, \mathrm{CaO}, \mathrm{Na}_{2} \mathrm{O}_{2}, \mathrm{KO}_{2}, \mathrm{MgO}$ and $\mathrm{K}_{2} \mathrm{O}$