QBManager

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313689 The calculated bond order of superoxide ion $(O_{2}^{-})$

1 1.5

2 1

3 2.5

4 2

Explanation:

The bond order of superoxide ion $O_{2}^{-}$ is
$O_{2}^{-} \to σ 1 s^{2} σ^{*} 1 s^{2} σ 2 s^{2} σ^{*} 2 s^{2} {σ 2 p}_{z}^{2} {π 2 p}_{x}^{2}$
$\approx π {2 p}_{y}^{2} π^{*} {2 p}_{x}^{2} \approx π^{*} {2 p}_{y}^{1}$
Bond order
$= 1 / 2 [N_{b} - N_{a}] = 1 / 2 [10 - 7] = 1 .5$

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313690 Which molecule/ion out of the following does not contain unpaired electrons?

1

N_{2}^{+}

2

O_{2}

3

O_{2}^{2 -}

4

B_{2}

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313700 Bond order of 1.5 is shown by

1

O_{2}^{2 -}

2

O_{2}

3

O_{2}^{+}

4

O_{2}^{-}

Explanation:

$K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{x}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{2} {π^{*}}_{2 p_{y}}^{1}$
$\Rightarrow B . O . = \frac{8 - 5}{2} = 1 .5$

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313692 In which pair, the stronger bond found in the first species
(I) $O_{2}^{-}, O_{2}$
(II) $N_{2} {. N}_{2}^{+}$
(III) $N O^{+}, N O^{-}$

1 (I) only

2 (II) only

3 (I) and (III) only

4 (II) and (III) only

Explanation:

B.O. is directly proportional to the strength of the bond.
(I) B.O. of $O_{2}^{-}$ is 1.5 and $O_{2}$ is 2
(II) B.O. of $N_{2}$ is 3 and $N_{2}^{+}$ is 2.5
(III) B.O. of $N O^{+}$ is 3 and $N O^{-}$ is 2.

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313693 During change of $O_{2} t o O_{2}^{-}$ ion, the electrons adds on which one of the following orbitals?

1

π^{*} o r b i t a l

2

π o r b i t a l

3

σ^{*} o r b i t a l

4

σ o r b i t a l

Explanation:

M.O. configuration of $O_{2}$
$\Rightarrow K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{1} {π^{*}}_{2 p_{y}}^{1}$
$F o r O_{2}^{-} : K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{x}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{2} {π^{*}}_{2 p_{y}}^{1}$
Molecular orbitals $p^{*} 2 p_{x}$ gains electron when $O_{2}^{-}$ is formed from $O_{2}$ .

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313689 The calculated bond order of superoxide ion $(O_{2}^{-})$

1 1.5

2 1

3 2.5

4 2

Explanation:

The bond order of superoxide ion $O_{2}^{-}$ is
$O_{2}^{-} \to σ 1 s^{2} σ^{*} 1 s^{2} σ 2 s^{2} σ^{*} 2 s^{2} {σ 2 p}_{z}^{2} {π 2 p}_{x}^{2}$
$\approx π {2 p}_{y}^{2} π^{*} {2 p}_{x}^{2} \approx π^{*} {2 p}_{y}^{1}$
Bond order
$= 1 / 2 [N_{b} - N_{a}] = 1 / 2 [10 - 7] = 1 .5$

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313690 Which molecule/ion out of the following does not contain unpaired electrons?

1

N_{2}^{+}

2

O_{2}

3

O_{2}^{2 -}

4

B_{2}

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313700 Bond order of 1.5 is shown by

1

O_{2}^{2 -}

2

O_{2}

3

O_{2}^{+}

4

O_{2}^{-}

Explanation:

$K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{x}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{2} {π^{*}}_{2 p_{y}}^{1}$
$\Rightarrow B . O . = \frac{8 - 5}{2} = 1 .5$

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313692 In which pair, the stronger bond found in the first species
(I) $O_{2}^{-}, O_{2}$
(II) $N_{2} {. N}_{2}^{+}$
(III) $N O^{+}, N O^{-}$

1 (I) only

2 (II) only

3 (I) and (III) only

4 (II) and (III) only

Explanation:

B.O. is directly proportional to the strength of the bond.
(I) B.O. of $O_{2}^{-}$ is 1.5 and $O_{2}$ is 2
(II) B.O. of $N_{2}$ is 3 and $N_{2}^{+}$ is 2.5
(III) B.O. of $N O^{+}$ is 3 and $N O^{-}$ is 2.

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313693 During change of $O_{2} t o O_{2}^{-}$ ion, the electrons adds on which one of the following orbitals?

1

π^{*} o r b i t a l

2

π o r b i t a l

3

σ^{*} o r b i t a l

4

σ o r b i t a l

Explanation:

M.O. configuration of $O_{2}$
$\Rightarrow K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{1} {π^{*}}_{2 p_{y}}^{1}$
$F o r O_{2}^{-} : K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{x}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{2} {π^{*}}_{2 p_{y}}^{1}$
Molecular orbitals $p^{*} 2 p_{x}$ gains electron when $O_{2}^{-}$ is formed from $O_{2}$ .

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313689 The calculated bond order of superoxide ion $(O_{2}^{-})$

1 1.5

2 1

3 2.5

4 2

Explanation:

The bond order of superoxide ion $O_{2}^{-}$ is
$O_{2}^{-} \to σ 1 s^{2} σ^{*} 1 s^{2} σ 2 s^{2} σ^{*} 2 s^{2} {σ 2 p}_{z}^{2} {π 2 p}_{x}^{2}$
$\approx π {2 p}_{y}^{2} π^{*} {2 p}_{x}^{2} \approx π^{*} {2 p}_{y}^{1}$
Bond order
$= 1 / 2 [N_{b} - N_{a}] = 1 / 2 [10 - 7] = 1 .5$

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313690 Which molecule/ion out of the following does not contain unpaired electrons?

1

N_{2}^{+}

2

O_{2}

3

O_{2}^{2 -}

4

B_{2}

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313700 Bond order of 1.5 is shown by

1

O_{2}^{2 -}

2

O_{2}

3

O_{2}^{+}

4

O_{2}^{-}

Explanation:

$K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{x}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{2} {π^{*}}_{2 p_{y}}^{1}$
$\Rightarrow B . O . = \frac{8 - 5}{2} = 1 .5$

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313692 In which pair, the stronger bond found in the first species
(I) $O_{2}^{-}, O_{2}$
(II) $N_{2} {. N}_{2}^{+}$
(III) $N O^{+}, N O^{-}$

1 (I) only

2 (II) only

3 (I) and (III) only

4 (II) and (III) only

Explanation:

B.O. is directly proportional to the strength of the bond.
(I) B.O. of $O_{2}^{-}$ is 1.5 and $O_{2}$ is 2
(II) B.O. of $N_{2}$ is 3 and $N_{2}^{+}$ is 2.5
(III) B.O. of $N O^{+}$ is 3 and $N O^{-}$ is 2.

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313693 During change of $O_{2} t o O_{2}^{-}$ ion, the electrons adds on which one of the following orbitals?

1

π^{*} o r b i t a l

2

π o r b i t a l

3

σ^{*} o r b i t a l

4

σ o r b i t a l

Explanation:

M.O. configuration of $O_{2}$
$\Rightarrow K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{1} {π^{*}}_{2 p_{y}}^{1}$
$F o r O_{2}^{-} : K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{x}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{2} {π^{*}}_{2 p_{y}}^{1}$
Molecular orbitals $p^{*} 2 p_{x}$ gains electron when $O_{2}^{-}$ is formed from $O_{2}$ .

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313689 The calculated bond order of superoxide ion $(O_{2}^{-})$

1 1.5

2 1

3 2.5

4 2

Explanation:

The bond order of superoxide ion $O_{2}^{-}$ is
$O_{2}^{-} \to σ 1 s^{2} σ^{*} 1 s^{2} σ 2 s^{2} σ^{*} 2 s^{2} {σ 2 p}_{z}^{2} {π 2 p}_{x}^{2}$
$\approx π {2 p}_{y}^{2} π^{*} {2 p}_{x}^{2} \approx π^{*} {2 p}_{y}^{1}$
Bond order
$= 1 / 2 [N_{b} - N_{a}] = 1 / 2 [10 - 7] = 1 .5$

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313690 Which molecule/ion out of the following does not contain unpaired electrons?

1

N_{2}^{+}

2

O_{2}

3

O_{2}^{2 -}

4

B_{2}

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313700 Bond order of 1.5 is shown by

1

O_{2}^{2 -}

2

O_{2}

3

O_{2}^{+}

4

O_{2}^{-}

Explanation:

$K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{x}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{2} {π^{*}}_{2 p_{y}}^{1}$
$\Rightarrow B . O . = \frac{8 - 5}{2} = 1 .5$

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313692 In which pair, the stronger bond found in the first species
(I) $O_{2}^{-}, O_{2}$
(II) $N_{2} {. N}_{2}^{+}$
(III) $N O^{+}, N O^{-}$

1 (I) only

2 (II) only

3 (I) and (III) only

4 (II) and (III) only

Explanation:

B.O. is directly proportional to the strength of the bond.
(I) B.O. of $O_{2}^{-}$ is 1.5 and $O_{2}$ is 2
(II) B.O. of $N_{2}$ is 3 and $N_{2}^{+}$ is 2.5
(III) B.O. of $N O^{+}$ is 3 and $N O^{-}$ is 2.

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313693 During change of $O_{2} t o O_{2}^{-}$ ion, the electrons adds on which one of the following orbitals?

1

π^{*} o r b i t a l

2

π o r b i t a l

3

σ^{*} o r b i t a l

4

σ o r b i t a l

Explanation:

M.O. configuration of $O_{2}$
$\Rightarrow K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{1} {π^{*}}_{2 p_{y}}^{1}$
$F o r O_{2}^{-} : K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{x}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{2} {π^{*}}_{2 p_{y}}^{1}$
Molecular orbitals $p^{*} 2 p_{x}$ gains electron when $O_{2}^{-}$ is formed from $O_{2}$ .

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313689 The calculated bond order of superoxide ion $(O_{2}^{-})$

1 1.5

2 1

3 2.5

4 2

Explanation:

The bond order of superoxide ion $O_{2}^{-}$ is
$O_{2}^{-} \to σ 1 s^{2} σ^{*} 1 s^{2} σ 2 s^{2} σ^{*} 2 s^{2} {σ 2 p}_{z}^{2} {π 2 p}_{x}^{2}$
$\approx π {2 p}_{y}^{2} π^{*} {2 p}_{x}^{2} \approx π^{*} {2 p}_{y}^{1}$
Bond order
$= 1 / 2 [N_{b} - N_{a}] = 1 / 2 [10 - 7] = 1 .5$

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313690 Which molecule/ion out of the following does not contain unpaired electrons?

1

N_{2}^{+}

2

O_{2}

3

O_{2}^{2 -}

4

B_{2}

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313700 Bond order of 1.5 is shown by

1

O_{2}^{2 -}

2

O_{2}

3

O_{2}^{+}

4

O_{2}^{-}

Explanation:

$K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{x}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{2} {π^{*}}_{2 p_{y}}^{1}$
$\Rightarrow B . O . = \frac{8 - 5}{2} = 1 .5$

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313692 In which pair, the stronger bond found in the first species
(I) $O_{2}^{-}, O_{2}$
(II) $N_{2} {. N}_{2}^{+}$
(III) $N O^{+}, N O^{-}$

1 (I) only

2 (II) only

3 (I) and (III) only

4 (II) and (III) only

Explanation:

B.O. is directly proportional to the strength of the bond.
(I) B.O. of $O_{2}^{-}$ is 1.5 and $O_{2}$ is 2
(II) B.O. of $N_{2}$ is 3 and $N_{2}^{+}$ is 2.5
(III) B.O. of $N O^{+}$ is 3 and $N O^{-}$ is 2.

CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313693 During change of $O_{2} t o O_{2}^{-}$ ion, the electrons adds on which one of the following orbitals?

1

π^{*} o r b i t a l

2

π o r b i t a l

3

σ^{*} o r b i t a l

4

σ o r b i t a l

Explanation:

M.O. configuration of $O_{2}$
$\Rightarrow K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{1} {π^{*}}_{2 p_{y}}^{1}$
$F o r O_{2}^{-} : K K σ_{2 s}^{2} {σ^{*}}_{2 s}^{2} σ_{2 P_{Z}}^{2} π_{2 p_{x}}^{2} π_{2 p_{y}}^{2} {π^{*}}_{2 p_{x}}^{2} {π^{*}}_{2 p_{y}}^{1}$
Molecular orbitals $p^{*} 2 p_{x}$ gains electron when $O_{2}^{-}$ is formed from $O_{2}$ .

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Question Bank Series

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation: