$A$. $\mathrm{Be} \rightarrow \mathrm{Be}^{-}$
$B$. $\mathrm{N} \rightarrow \mathrm{N}^{-}$
$C$. $\mathrm{O} \rightarrow \mathrm{O}^{2-}$
$D$. $\mathrm{Na} \rightarrow \mathrm{Na}^{-}$
$E$. $\mathrm{Al} \rightarrow \mathrm{Al}^{-}$
નીચે આપેલ વિકલ્પોમાંથી સૌથી બંધ બેસતો જવાબ પસંદ કરો.
\((B)\) \(\mathrm{N}+\mathrm{e}^{-} \rightarrow \mathrm{N}^{-} \quad\) E.A \(=-\) ive
\((C)\) \(\mathrm{O}+\mathrm{e}^{-} \rightarrow \mathrm{O}^{-}\)
\(\mathrm{O}^{-}+\mathrm{e}^{-} \rightarrow \mathrm{O}^{-2} \quad\) E.A \(=-\) ive
\((D)\) \(\mathrm{Na}+\mathrm{e}^{-} \rightarrow \mathrm{Na}^{-} \quad\) E.A \(=+\) ive
\((E)\) \(\mathrm{A} \ell+\mathrm{e}^{-} \rightarrow \mathrm{A} \ell^{-} \quad\) E.A \(=+\) ive
Ans. \(A,B\) and \(C\) only
${{O}^{-}}_{\left( g \right)}+{{e}^{-}}\to O_{\left( g \right)}^{2-};\Delta {{H}^{o}}=844\,kJ\,mo{{l}^{-1}}$
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