MCQ
When $F{e^{2 + }}$ changes to $F{e^{3 + }}$ in a reaction
- ✓It loses an electron
- BIt gains an electron
- CIt loses a proton
- DIt gains a proton
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$I.$ one atom of oxygen
$II.$ one atom of nitrogen
$III.$ $1\times10^{-10}$ mole of oxygen
$IV.$ $1\times10^{-10}$ mole of copper

