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## QuestionChemistryClass 11

$${N}_{{2}}$$ and $${O}_{{2}}$$ are converted to mono cations $${{N}_{{2}}^{+}}$$ and $${{O}_{{2}}^{+}}$$ respectively, which statement is wrong ?
(A) in $${{N}_{{2}}^{+}}$$ , the $${N}-{N}$$ bond weakens
(B) In $${O}-{2}^{+}$$ , the $${O}-{O}$$ bond order increase
(C) in $${{O}_{{2}}^{+}}$$ , the paramagnetism decrease
(D) $${{N}_{{2}}^{+}}$$ become diamagnetic

M.O. configuration of
$${N}_{{2}},\sigma{1}{s}^{{2}}{\sin{{g}}}{a}^{{\ast}}{1}{s}^{{2}},\sigma{2}{s}^{{2}}\sigma^{{\ast}}{2}{s}^{{2}}{\left[\matrix{\pi{2}{{p}_{{y}}^{{2}}}\\\pi{2}{{p}_{{z}}^{{2}}}}\right]}\sigma{2}{{p}_{{y}}^{{2}}}$$
$${{N}_{{2}}^{+}},{1}{s}^{{2}}\sigma^{\cdot}{1}{s}^{{2}},\sigma{2}{s}^{{2}}{s}{i}{m}{g}{a}^{{\ast}}{2}{s}^{{2}}{\left[\matrix{\pi{2}{{p}_{{y}}^{{2}}}\\\pi{2}{{p}_{{z}}^{{2}}}}\right]}\sigma{2}{{p}_{{x}}^{{1}}}$$
Thus bond order for $${N}_{{2}}={1}/{2}{\left[{10}-{4}\right]}={3},$$
Also due to one unpaired electron $${{N}_{{2}}^{+}}$$ is paramangetic . Since bond order for $${{N}_{{2}}^{+}}={2.5}$$ and thus $${N}-{N}$$ bond in $${{N}_{{2}}^{+}}$$ weakens
M.O. configuration of
$${O}_{{2}}:\sigma{1}{s}^{{2}}\sigma{s}^{{2}},{s}{i}{m}{g}{a}^{{\ast}}{2}{s}^{{2}},{s}{i}{m}{g}{a}{2}{{p}_{{x}}^{{2}}}$$
$${\underset{{{\left[\pi{2}{{p}_{{y}}^{{2}}}\right)},{\left(\pi{2}{{p}_{{z}}^{{2}}}\right)}}}{{{\left(\pi^{{\ast}}{2}{{p}_{{y}}^{{1}}}\right)}}}}{\left[\pi^{{\ast}}{2}{{p}_{{y}}^{{1}}}\right)},{\left(\pi^{+}{2}{{p}_{{z}}^{{1}}}\right)}{]}{)}$$
$${O}_{{{2}}}:\sigma{1}{s}^{{{2}}}\sigma^{{\ast}}{1}{s}^{{{2}}},\sigma{2},\sigma{s}^{{{2}}}\sigma^{{\ast}}{2}{s}^{{{2}}},\sigma{2}{{p}_{{{x}}}^{{{2}}}}$$underset([(pi2p_(y)^(2)),(pi2p_(z)^(2))]:} $${\underset{{{\left[\matrix{\pi^{{\ast}}{2}{{p}_{{{y}}}^{{{2}}}}\\\pi^{{\ast}}{{p}_{{{z}}}^{{{1}}}}}\right]}}}{}}$$
$${{O}_{{{2}}}^{{+}}}:\sigma{1}{s}^{{{2}}}\sigma^{{\ast}}{1}{s}^{{{2}}},\sigma{2}{s}^{{{2}}}\sigma^{{\ast}}{2}{s}^{{{2}}},\sigma{2}{{p}_{{{x}}}^{{{2}}}}{\left[\pi^{{\ast}}{2}{{p}_{{{y}}}^{{{1}}}}\right]}$$.
Thus bond order $${O}_{{2}}$$ and $${{O}_{{2}}^{+}}$$ are (2) and $${2.5}$$ respectively . More is bond order lesser is bobnd length .