MCQ
Graphite cleaves easily between the layers. Thus, it is :
- ASoft.
- BSlippery.
- ✓Both $(a)$ and $(b).$
- DNone of these.
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${{O}_{(g)}}+{{e}^{-}}=O_{(g)}^{-}\Delta {{H}^{o}}=-142\ kJ\,mo{{l}^{-1}}$
$O_{(g)}^{-}+{{e}^{-}}=O_{(g)}^{2-}\Delta {{H}^{o}}=844\ kJ\,mo{{l}^{-1}}$