313743
How many orbitals are singly occupied in \({{\rm{O}}_{\rm{2}}}\) molecule?
1 1
2 2
3 3
4 4
Explanation:
According to MOT
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313744
\({\rm{O}}\,\,{\rm{ - }}\,\,{\rm{O}}\) bond lengths in \({{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}\left[ {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right]\,\,{\rm{and}}\,\,{\rm{K}}{{\rm{O}}_{\rm{2}}}\) increasing order are
In \({{\rm{O}}_{\rm{2}}}\left( {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right){\rm{,}}\,\,{\rm{O}}_{\rm{2}}^{\rm{ + }}\) has bond order 2.5. \({{\rm{O}}_{\rm{2}}}\) has bond order 2.0 In \({\rm{K}}{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{O}}_{\rm{2}}^{\rm{ - }}\) has bond order 1.5. Higher the bond order, smaller is the bond length. Hence, the bond order is \({{\rm{O}}_{\rm{2}}}\left( {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right){\rm{ < }}{{\rm{O}}_{\rm{2}}}{\rm{ < K}}{{\rm{O}}_{\rm{2}}}{\rm{.}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313745
Four diatomic species are listed below in different sequences. The correct order of their bond orders is
Bond orders are : \({\rm{He}}_{\rm{2}}^{\rm{ + }}{\rm{ = 0}}{\rm{.5;O}}_{\rm{2}}^{\rm{ - }}{\rm{ = 1}}{\rm{.5;}}\) \({\rm{NO = 2}}{\rm{.5;C}}_{\rm{2}}^{{\rm{2 - }}}{\rm{ = 3}}{\rm{.0}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313746
The formatting issue \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) is
1 Both \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) do not exist
2 \({\rm{H}}_{\rm{2}}^{\rm{ - }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ + }}\)
3 \({\rm{H}}_{\rm{2}}^{\rm{ + }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ - }}\)
4 Both \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) are equally stable
Explanation:
\({\rm{H}}_{\rm{2}}^{\rm{ + }}\;{\rm{:}}\left( {{\rm{\sigma 1}}{{\rm{s}}^{\rm{1}}}} \right)\) \(\therefore \,{\rm{B}}{\rm{.O}}{\rm{. = }}\frac{{\rm{1}}}{{\rm{2}}}\left( {{\rm{1 - 0}}} \right){\rm{ = }}\frac{{\rm{1}}}{{\rm{2}}}\) \({\rm{H}}_{\rm{2}}^{\rm{ - }}\,{\rm{:}}\,\left( {{\rm{\sigma 1}}{{\rm{s}}^{\rm{2}}}} \right)\left( {{{\rm{\sigma }}^{\rm{*}}}{\rm{1}}{{\rm{s}}^{\rm{1}}}} \right)\) \(\therefore \,{\rm{B}}{\rm{.O}}{\rm{. = }}\frac{{\rm{1}}}{{\rm{2}}}\left( {{\rm{2 - 1}}} \right){\rm{ = }}\frac{{\rm{1}}}{{\rm{2}}}\) Even though the bond order of \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) are equal but \({\rm{H}}_{\rm{2}}^{\rm{ + }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ - }}\) as in the latter, an electron is present in the higher energy antibonding \(\left( {{{\rm{\sigma }}^{\rm{*}}}{\rm{1s}}} \right)\) orbital.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313747
Which of the following cannot be formed?
1 \({\rm{H}}{{\rm{e}}^{{\rm{2 + }}}}\)
2 \({\rm{H}}{{\rm{e}}^{\rm{ + }}}\)
3 \({\rm{He}}\)
4 \({\rm{H}}{{\rm{e}}_{\rm{2}}}\)
Explanation:
\({\rm{H}}{{\rm{e}}_{\rm{2}}}\) cannot be formed as bond order is zero.
313743
How many orbitals are singly occupied in \({{\rm{O}}_{\rm{2}}}\) molecule?
1 1
2 2
3 3
4 4
Explanation:
According to MOT
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313744
\({\rm{O}}\,\,{\rm{ - }}\,\,{\rm{O}}\) bond lengths in \({{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}\left[ {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right]\,\,{\rm{and}}\,\,{\rm{K}}{{\rm{O}}_{\rm{2}}}\) increasing order are
In \({{\rm{O}}_{\rm{2}}}\left( {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right){\rm{,}}\,\,{\rm{O}}_{\rm{2}}^{\rm{ + }}\) has bond order 2.5. \({{\rm{O}}_{\rm{2}}}\) has bond order 2.0 In \({\rm{K}}{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{O}}_{\rm{2}}^{\rm{ - }}\) has bond order 1.5. Higher the bond order, smaller is the bond length. Hence, the bond order is \({{\rm{O}}_{\rm{2}}}\left( {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right){\rm{ < }}{{\rm{O}}_{\rm{2}}}{\rm{ < K}}{{\rm{O}}_{\rm{2}}}{\rm{.}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313745
Four diatomic species are listed below in different sequences. The correct order of their bond orders is
Bond orders are : \({\rm{He}}_{\rm{2}}^{\rm{ + }}{\rm{ = 0}}{\rm{.5;O}}_{\rm{2}}^{\rm{ - }}{\rm{ = 1}}{\rm{.5;}}\) \({\rm{NO = 2}}{\rm{.5;C}}_{\rm{2}}^{{\rm{2 - }}}{\rm{ = 3}}{\rm{.0}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313746
The formatting issue \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) is
1 Both \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) do not exist
2 \({\rm{H}}_{\rm{2}}^{\rm{ - }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ + }}\)
3 \({\rm{H}}_{\rm{2}}^{\rm{ + }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ - }}\)
4 Both \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) are equally stable
Explanation:
\({\rm{H}}_{\rm{2}}^{\rm{ + }}\;{\rm{:}}\left( {{\rm{\sigma 1}}{{\rm{s}}^{\rm{1}}}} \right)\) \(\therefore \,{\rm{B}}{\rm{.O}}{\rm{. = }}\frac{{\rm{1}}}{{\rm{2}}}\left( {{\rm{1 - 0}}} \right){\rm{ = }}\frac{{\rm{1}}}{{\rm{2}}}\) \({\rm{H}}_{\rm{2}}^{\rm{ - }}\,{\rm{:}}\,\left( {{\rm{\sigma 1}}{{\rm{s}}^{\rm{2}}}} \right)\left( {{{\rm{\sigma }}^{\rm{*}}}{\rm{1}}{{\rm{s}}^{\rm{1}}}} \right)\) \(\therefore \,{\rm{B}}{\rm{.O}}{\rm{. = }}\frac{{\rm{1}}}{{\rm{2}}}\left( {{\rm{2 - 1}}} \right){\rm{ = }}\frac{{\rm{1}}}{{\rm{2}}}\) Even though the bond order of \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) are equal but \({\rm{H}}_{\rm{2}}^{\rm{ + }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ - }}\) as in the latter, an electron is present in the higher energy antibonding \(\left( {{{\rm{\sigma }}^{\rm{*}}}{\rm{1s}}} \right)\) orbital.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313747
Which of the following cannot be formed?
1 \({\rm{H}}{{\rm{e}}^{{\rm{2 + }}}}\)
2 \({\rm{H}}{{\rm{e}}^{\rm{ + }}}\)
3 \({\rm{He}}\)
4 \({\rm{H}}{{\rm{e}}_{\rm{2}}}\)
Explanation:
\({\rm{H}}{{\rm{e}}_{\rm{2}}}\) cannot be formed as bond order is zero.
313743
How many orbitals are singly occupied in \({{\rm{O}}_{\rm{2}}}\) molecule?
1 1
2 2
3 3
4 4
Explanation:
According to MOT
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313744
\({\rm{O}}\,\,{\rm{ - }}\,\,{\rm{O}}\) bond lengths in \({{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}\left[ {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right]\,\,{\rm{and}}\,\,{\rm{K}}{{\rm{O}}_{\rm{2}}}\) increasing order are
In \({{\rm{O}}_{\rm{2}}}\left( {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right){\rm{,}}\,\,{\rm{O}}_{\rm{2}}^{\rm{ + }}\) has bond order 2.5. \({{\rm{O}}_{\rm{2}}}\) has bond order 2.0 In \({\rm{K}}{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{O}}_{\rm{2}}^{\rm{ - }}\) has bond order 1.5. Higher the bond order, smaller is the bond length. Hence, the bond order is \({{\rm{O}}_{\rm{2}}}\left( {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right){\rm{ < }}{{\rm{O}}_{\rm{2}}}{\rm{ < K}}{{\rm{O}}_{\rm{2}}}{\rm{.}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313745
Four diatomic species are listed below in different sequences. The correct order of their bond orders is
Bond orders are : \({\rm{He}}_{\rm{2}}^{\rm{ + }}{\rm{ = 0}}{\rm{.5;O}}_{\rm{2}}^{\rm{ - }}{\rm{ = 1}}{\rm{.5;}}\) \({\rm{NO = 2}}{\rm{.5;C}}_{\rm{2}}^{{\rm{2 - }}}{\rm{ = 3}}{\rm{.0}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313746
The formatting issue \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) is
1 Both \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) do not exist
2 \({\rm{H}}_{\rm{2}}^{\rm{ - }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ + }}\)
3 \({\rm{H}}_{\rm{2}}^{\rm{ + }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ - }}\)
4 Both \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) are equally stable
Explanation:
\({\rm{H}}_{\rm{2}}^{\rm{ + }}\;{\rm{:}}\left( {{\rm{\sigma 1}}{{\rm{s}}^{\rm{1}}}} \right)\) \(\therefore \,{\rm{B}}{\rm{.O}}{\rm{. = }}\frac{{\rm{1}}}{{\rm{2}}}\left( {{\rm{1 - 0}}} \right){\rm{ = }}\frac{{\rm{1}}}{{\rm{2}}}\) \({\rm{H}}_{\rm{2}}^{\rm{ - }}\,{\rm{:}}\,\left( {{\rm{\sigma 1}}{{\rm{s}}^{\rm{2}}}} \right)\left( {{{\rm{\sigma }}^{\rm{*}}}{\rm{1}}{{\rm{s}}^{\rm{1}}}} \right)\) \(\therefore \,{\rm{B}}{\rm{.O}}{\rm{. = }}\frac{{\rm{1}}}{{\rm{2}}}\left( {{\rm{2 - 1}}} \right){\rm{ = }}\frac{{\rm{1}}}{{\rm{2}}}\) Even though the bond order of \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) are equal but \({\rm{H}}_{\rm{2}}^{\rm{ + }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ - }}\) as in the latter, an electron is present in the higher energy antibonding \(\left( {{{\rm{\sigma }}^{\rm{*}}}{\rm{1s}}} \right)\) orbital.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313747
Which of the following cannot be formed?
1 \({\rm{H}}{{\rm{e}}^{{\rm{2 + }}}}\)
2 \({\rm{H}}{{\rm{e}}^{\rm{ + }}}\)
3 \({\rm{He}}\)
4 \({\rm{H}}{{\rm{e}}_{\rm{2}}}\)
Explanation:
\({\rm{H}}{{\rm{e}}_{\rm{2}}}\) cannot be formed as bond order is zero.
313743
How many orbitals are singly occupied in \({{\rm{O}}_{\rm{2}}}\) molecule?
1 1
2 2
3 3
4 4
Explanation:
According to MOT
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313744
\({\rm{O}}\,\,{\rm{ - }}\,\,{\rm{O}}\) bond lengths in \({{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}\left[ {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right]\,\,{\rm{and}}\,\,{\rm{K}}{{\rm{O}}_{\rm{2}}}\) increasing order are
In \({{\rm{O}}_{\rm{2}}}\left( {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right){\rm{,}}\,\,{\rm{O}}_{\rm{2}}^{\rm{ + }}\) has bond order 2.5. \({{\rm{O}}_{\rm{2}}}\) has bond order 2.0 In \({\rm{K}}{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{O}}_{\rm{2}}^{\rm{ - }}\) has bond order 1.5. Higher the bond order, smaller is the bond length. Hence, the bond order is \({{\rm{O}}_{\rm{2}}}\left( {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right){\rm{ < }}{{\rm{O}}_{\rm{2}}}{\rm{ < K}}{{\rm{O}}_{\rm{2}}}{\rm{.}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313745
Four diatomic species are listed below in different sequences. The correct order of their bond orders is
Bond orders are : \({\rm{He}}_{\rm{2}}^{\rm{ + }}{\rm{ = 0}}{\rm{.5;O}}_{\rm{2}}^{\rm{ - }}{\rm{ = 1}}{\rm{.5;}}\) \({\rm{NO = 2}}{\rm{.5;C}}_{\rm{2}}^{{\rm{2 - }}}{\rm{ = 3}}{\rm{.0}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313746
The formatting issue \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) is
1 Both \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) do not exist
2 \({\rm{H}}_{\rm{2}}^{\rm{ - }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ + }}\)
3 \({\rm{H}}_{\rm{2}}^{\rm{ + }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ - }}\)
4 Both \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) are equally stable
Explanation:
\({\rm{H}}_{\rm{2}}^{\rm{ + }}\;{\rm{:}}\left( {{\rm{\sigma 1}}{{\rm{s}}^{\rm{1}}}} \right)\) \(\therefore \,{\rm{B}}{\rm{.O}}{\rm{. = }}\frac{{\rm{1}}}{{\rm{2}}}\left( {{\rm{1 - 0}}} \right){\rm{ = }}\frac{{\rm{1}}}{{\rm{2}}}\) \({\rm{H}}_{\rm{2}}^{\rm{ - }}\,{\rm{:}}\,\left( {{\rm{\sigma 1}}{{\rm{s}}^{\rm{2}}}} \right)\left( {{{\rm{\sigma }}^{\rm{*}}}{\rm{1}}{{\rm{s}}^{\rm{1}}}} \right)\) \(\therefore \,{\rm{B}}{\rm{.O}}{\rm{. = }}\frac{{\rm{1}}}{{\rm{2}}}\left( {{\rm{2 - 1}}} \right){\rm{ = }}\frac{{\rm{1}}}{{\rm{2}}}\) Even though the bond order of \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) are equal but \({\rm{H}}_{\rm{2}}^{\rm{ + }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ - }}\) as in the latter, an electron is present in the higher energy antibonding \(\left( {{{\rm{\sigma }}^{\rm{*}}}{\rm{1s}}} \right)\) orbital.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313747
Which of the following cannot be formed?
1 \({\rm{H}}{{\rm{e}}^{{\rm{2 + }}}}\)
2 \({\rm{H}}{{\rm{e}}^{\rm{ + }}}\)
3 \({\rm{He}}\)
4 \({\rm{H}}{{\rm{e}}_{\rm{2}}}\)
Explanation:
\({\rm{H}}{{\rm{e}}_{\rm{2}}}\) cannot be formed as bond order is zero.
313743
How many orbitals are singly occupied in \({{\rm{O}}_{\rm{2}}}\) molecule?
1 1
2 2
3 3
4 4
Explanation:
According to MOT
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313744
\({\rm{O}}\,\,{\rm{ - }}\,\,{\rm{O}}\) bond lengths in \({{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{{\rm{O}}_{\rm{2}}}\left[ {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right]\,\,{\rm{and}}\,\,{\rm{K}}{{\rm{O}}_{\rm{2}}}\) increasing order are
In \({{\rm{O}}_{\rm{2}}}\left( {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right){\rm{,}}\,\,{\rm{O}}_{\rm{2}}^{\rm{ + }}\) has bond order 2.5. \({{\rm{O}}_{\rm{2}}}\) has bond order 2.0 In \({\rm{K}}{{\rm{O}}_{\rm{2}}}{\rm{,}}\,\,{\rm{O}}_{\rm{2}}^{\rm{ - }}\) has bond order 1.5. Higher the bond order, smaller is the bond length. Hence, the bond order is \({{\rm{O}}_{\rm{2}}}\left( {{\rm{As}}{{\rm{F}}_{\rm{6}}}} \right){\rm{ < }}{{\rm{O}}_{\rm{2}}}{\rm{ < K}}{{\rm{O}}_{\rm{2}}}{\rm{.}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313745
Four diatomic species are listed below in different sequences. The correct order of their bond orders is
Bond orders are : \({\rm{He}}_{\rm{2}}^{\rm{ + }}{\rm{ = 0}}{\rm{.5;O}}_{\rm{2}}^{\rm{ - }}{\rm{ = 1}}{\rm{.5;}}\) \({\rm{NO = 2}}{\rm{.5;C}}_{\rm{2}}^{{\rm{2 - }}}{\rm{ = 3}}{\rm{.0}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313746
The formatting issue \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) is
1 Both \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) do not exist
2 \({\rm{H}}_{\rm{2}}^{\rm{ - }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ + }}\)
3 \({\rm{H}}_{\rm{2}}^{\rm{ + }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ - }}\)
4 Both \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) are equally stable
Explanation:
\({\rm{H}}_{\rm{2}}^{\rm{ + }}\;{\rm{:}}\left( {{\rm{\sigma 1}}{{\rm{s}}^{\rm{1}}}} \right)\) \(\therefore \,{\rm{B}}{\rm{.O}}{\rm{. = }}\frac{{\rm{1}}}{{\rm{2}}}\left( {{\rm{1 - 0}}} \right){\rm{ = }}\frac{{\rm{1}}}{{\rm{2}}}\) \({\rm{H}}_{\rm{2}}^{\rm{ - }}\,{\rm{:}}\,\left( {{\rm{\sigma 1}}{{\rm{s}}^{\rm{2}}}} \right)\left( {{{\rm{\sigma }}^{\rm{*}}}{\rm{1}}{{\rm{s}}^{\rm{1}}}} \right)\) \(\therefore \,{\rm{B}}{\rm{.O}}{\rm{. = }}\frac{{\rm{1}}}{{\rm{2}}}\left( {{\rm{2 - 1}}} \right){\rm{ = }}\frac{{\rm{1}}}{{\rm{2}}}\) Even though the bond order of \({\rm{H}}_{\rm{2}}^{\rm{ + }}\,\,{\rm{and}}\,\,{\rm{H}}_{\rm{2}}^{\rm{ - }}\) are equal but \({\rm{H}}_{\rm{2}}^{\rm{ + }}\) is more stable than \({\rm{H}}_{\rm{2}}^{\rm{ - }}\) as in the latter, an electron is present in the higher energy antibonding \(\left( {{{\rm{\sigma }}^{\rm{*}}}{\rm{1s}}} \right)\) orbital.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE
313747
Which of the following cannot be formed?
1 \({\rm{H}}{{\rm{e}}^{{\rm{2 + }}}}\)
2 \({\rm{H}}{{\rm{e}}^{\rm{ + }}}\)
3 \({\rm{He}}\)
4 \({\rm{H}}{{\rm{e}}_{\rm{2}}}\)
Explanation:
\({\rm{H}}{{\rm{e}}_{\rm{2}}}\) cannot be formed as bond order is zero.
