MCQ
An organic compound is estimated through Dumus method and was found to evolve $6\,mole$ of $CO_2\,\,4\,moles$ of $H_2O$ and $1\,mole$ of nitrogen gas. The formula of the compound is
- A$C_{12}H_8N$
- B$C_{12}H_8N_2$
- ✓$C_6H_8N_2$
- D$C_6H_8N$
$C_{atom}= 6,\,N_{atom} = 2$
Hence $C_6H_8N_2$
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Product of the above reaction is

$O\left( g \right) + {e^ - } \to O_{\left( g \right)}^ - \,\,\,\,;\,\,\,\,{\Delta _f}{H^\Theta } = - 141\,kJ\,mo{l^{ - 1}}$
${O^ - }\left( g \right) + {e^ - } \to O_{\left( g \right)}^{2 - }\,\,\,\,;\,\,\,\,{\Delta _f}{H^\Theta } = + 780\,kJ\,mo{l^{ - 1}}$
Thus process of formation of $O_2^-$ in gas phase is unfavourable even thought $O_2^-$ is isoelectronic with neon. It is due to the fact that,