Comparision of Valence Bond Theory and Molecular Orbital Theory
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313774 In which set of molecules all the species are paramagnetic?

1 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{N}}_{\rm{2}}}\)
2 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{NO}}\)
3 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{F}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}\)
4 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{L}}{{\rm{i}}_{\rm{2}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313775 Which of the following order of energies of molecular orbitals of \({{\rm{N}}_{\rm{2}}}\) is correct?

1 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ < }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ < }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
2 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ > }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ > }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
3 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ < }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ > }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
4 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ > }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ < }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313776 Which of the following molecules is paramagnetic?

1 \({{\rm{N}}_{\rm{2}}}\)
2 \({\rm{NO}}\)
3 \({\rm{CO}}\)
4 \({{\rm{O}}_{\rm{3}}}\)
JEE - 2014
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313777 Which one of the following molecules is expected to exhibit diamagnetic behaviour?

1 \({\rm{N}}_{\rm{2}}^{\rm{ + }}\)
2 \({{\rm{N}}_{\rm{2}}}\)
3 \({{\rm{O}}_{\rm{2}}}\)
4 \({{\rm{S}}_{\rm{2}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313778 The relative stabilities of \({\rm{CN,}}\,\,{\rm{C}}{{\rm{N}}^{\rm{ + }}}\,\,{\rm{and}}\,\,{\rm{C}}{{\rm{N}}^{\rm{ - }}}\) are in the order

1 \({\rm{CN > C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > C}}{{\rm{N}}^{\rm{ - }}}\)
2 \({\rm{C}}{{\rm{N}}^{\rm{ - }}}{\rm{ > CN > C}}{{\rm{N}}^{\rm{ + }}}\)
3 \({\rm{C}}{{\rm{N}}^{\rm{ - }}}{\rm{ > C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > CN}}\)
4 \({\rm{C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > CN > C}}{{\rm{N}}^{\rm{ - }}}\)
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313774 In which set of molecules all the species are paramagnetic?

1 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{N}}_{\rm{2}}}\)
2 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{NO}}\)
3 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{F}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}\)
4 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{L}}{{\rm{i}}_{\rm{2}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313775 Which of the following order of energies of molecular orbitals of \({{\rm{N}}_{\rm{2}}}\) is correct?

1 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ < }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ < }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
2 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ > }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ > }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
3 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ < }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ > }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
4 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ > }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ < }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313776 Which of the following molecules is paramagnetic?

1 \({{\rm{N}}_{\rm{2}}}\)
2 \({\rm{NO}}\)
3 \({\rm{CO}}\)
4 \({{\rm{O}}_{\rm{3}}}\)
JEE - 2014
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313777 Which one of the following molecules is expected to exhibit diamagnetic behaviour?

1 \({\rm{N}}_{\rm{2}}^{\rm{ + }}\)
2 \({{\rm{N}}_{\rm{2}}}\)
3 \({{\rm{O}}_{\rm{2}}}\)
4 \({{\rm{S}}_{\rm{2}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313778 The relative stabilities of \({\rm{CN,}}\,\,{\rm{C}}{{\rm{N}}^{\rm{ + }}}\,\,{\rm{and}}\,\,{\rm{C}}{{\rm{N}}^{\rm{ - }}}\) are in the order

1 \({\rm{CN > C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > C}}{{\rm{N}}^{\rm{ - }}}\)
2 \({\rm{C}}{{\rm{N}}^{\rm{ - }}}{\rm{ > CN > C}}{{\rm{N}}^{\rm{ + }}}\)
3 \({\rm{C}}{{\rm{N}}^{\rm{ - }}}{\rm{ > C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > CN}}\)
4 \({\rm{C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > CN > C}}{{\rm{N}}^{\rm{ - }}}\)
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313774 In which set of molecules all the species are paramagnetic?

1 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{N}}_{\rm{2}}}\)
2 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{NO}}\)
3 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{F}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}\)
4 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{L}}{{\rm{i}}_{\rm{2}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313775 Which of the following order of energies of molecular orbitals of \({{\rm{N}}_{\rm{2}}}\) is correct?

1 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ < }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ < }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
2 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ > }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ > }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
3 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ < }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ > }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
4 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ > }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ < }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313776 Which of the following molecules is paramagnetic?

1 \({{\rm{N}}_{\rm{2}}}\)
2 \({\rm{NO}}\)
3 \({\rm{CO}}\)
4 \({{\rm{O}}_{\rm{3}}}\)
JEE - 2014
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313777 Which one of the following molecules is expected to exhibit diamagnetic behaviour?

1 \({\rm{N}}_{\rm{2}}^{\rm{ + }}\)
2 \({{\rm{N}}_{\rm{2}}}\)
3 \({{\rm{O}}_{\rm{2}}}\)
4 \({{\rm{S}}_{\rm{2}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313778 The relative stabilities of \({\rm{CN,}}\,\,{\rm{C}}{{\rm{N}}^{\rm{ + }}}\,\,{\rm{and}}\,\,{\rm{C}}{{\rm{N}}^{\rm{ - }}}\) are in the order

1 \({\rm{CN > C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > C}}{{\rm{N}}^{\rm{ - }}}\)
2 \({\rm{C}}{{\rm{N}}^{\rm{ - }}}{\rm{ > CN > C}}{{\rm{N}}^{\rm{ + }}}\)
3 \({\rm{C}}{{\rm{N}}^{\rm{ - }}}{\rm{ > C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > CN}}\)
4 \({\rm{C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > CN > C}}{{\rm{N}}^{\rm{ - }}}\)
NEET DIGITAL LIBRARY
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313774 In which set of molecules all the species are paramagnetic?

1 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{N}}_{\rm{2}}}\)
2 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{NO}}\)
3 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{F}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}\)
4 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{L}}{{\rm{i}}_{\rm{2}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313775 Which of the following order of energies of molecular orbitals of \({{\rm{N}}_{\rm{2}}}\) is correct?

1 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ < }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ < }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
2 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ > }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ > }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
3 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ < }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ > }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
4 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ > }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ < }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313776 Which of the following molecules is paramagnetic?

1 \({{\rm{N}}_{\rm{2}}}\)
2 \({\rm{NO}}\)
3 \({\rm{CO}}\)
4 \({{\rm{O}}_{\rm{3}}}\)
JEE - 2014
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313777 Which one of the following molecules is expected to exhibit diamagnetic behaviour?

1 \({\rm{N}}_{\rm{2}}^{\rm{ + }}\)
2 \({{\rm{N}}_{\rm{2}}}\)
3 \({{\rm{O}}_{\rm{2}}}\)
4 \({{\rm{S}}_{\rm{2}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313778 The relative stabilities of \({\rm{CN,}}\,\,{\rm{C}}{{\rm{N}}^{\rm{ + }}}\,\,{\rm{and}}\,\,{\rm{C}}{{\rm{N}}^{\rm{ - }}}\) are in the order

1 \({\rm{CN > C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > C}}{{\rm{N}}^{\rm{ - }}}\)
2 \({\rm{C}}{{\rm{N}}^{\rm{ - }}}{\rm{ > CN > C}}{{\rm{N}}^{\rm{ + }}}\)
3 \({\rm{C}}{{\rm{N}}^{\rm{ - }}}{\rm{ > C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > CN}}\)
4 \({\rm{C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > CN > C}}{{\rm{N}}^{\rm{ - }}}\)
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313774 In which set of molecules all the species are paramagnetic?

1 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{N}}_{\rm{2}}}\)
2 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{NO}}\)
3 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{F}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}\)
4 \({{\rm{B}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{L}}{{\rm{i}}_{\rm{2}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313775 Which of the following order of energies of molecular orbitals of \({{\rm{N}}_{\rm{2}}}\) is correct?

1 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ < }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ < }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
2 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ > }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ > }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
3 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ < }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ > }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
4 \(\left( {{\rm{\pi 2}}{{\rm{p}}_{\rm{y}}}} \right){\rm{ > }}\left( {{\rm{\sigma 2}}{{\rm{p}}_{\rm{z}}}} \right){\rm{ < }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{x}}}} \right){\rm{ = }}\left( {{{\rm{\pi }}^{\rm{*}}}{\rm{2}}{{\rm{p}}_{\rm{y}}}} \right)\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313776 Which of the following molecules is paramagnetic?

1 \({{\rm{N}}_{\rm{2}}}\)
2 \({\rm{NO}}\)
3 \({\rm{CO}}\)
4 \({{\rm{O}}_{\rm{3}}}\)
JEE - 2014
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313777 Which one of the following molecules is expected to exhibit diamagnetic behaviour?

1 \({\rm{N}}_{\rm{2}}^{\rm{ + }}\)
2 \({{\rm{N}}_{\rm{2}}}\)
3 \({{\rm{O}}_{\rm{2}}}\)
4 \({{\rm{S}}_{\rm{2}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313778 The relative stabilities of \({\rm{CN,}}\,\,{\rm{C}}{{\rm{N}}^{\rm{ + }}}\,\,{\rm{and}}\,\,{\rm{C}}{{\rm{N}}^{\rm{ - }}}\) are in the order

1 \({\rm{CN > C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > C}}{{\rm{N}}^{\rm{ - }}}\)
2 \({\rm{C}}{{\rm{N}}^{\rm{ - }}}{\rm{ > CN > C}}{{\rm{N}}^{\rm{ + }}}\)
3 \({\rm{C}}{{\rm{N}}^{\rm{ - }}}{\rm{ > C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > CN}}\)
4 \({\rm{C}}{{\rm{N}}^{\rm{ + }}}{\rm{ > CN > C}}{{\rm{N}}^{\rm{ - }}}\)