MCQ
The compound that is not a Lewis acid is
- A$HSO_4^ - $
- B$AlC{l_3}$
- C$BeC{l_2}$
- ✓$N{H_3}$
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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
$O\left( g \right) + {e^ - } \to O_{\left( g \right)}^ - \,\,\,\,;\,\,\,\,{\Delta _f}{H^\Theta } = - 141\,kJ\,mo{l^{ - 1}}$
${O^ - }\left( g \right) + {e^ - } \to O_{\left( g \right)}^{2 - }\,\,\,\,;\,\,\,\,{\Delta _f}{H^\Theta } = + 780\,kJ\,mo{l^{ - 1}}$
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,
A graph is plotted between concentration and time as shown. Effect$-1$ & Effect$-2$ are due to respectively
