The number of antibonding electron pair(s) present in \(O_{2}^{2-}\)is:

1. 4 2. 3
3. 2 4. 1
Subtopic:  M.O.T |
 71%
From NCERT
AIPMT - 1998
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In PO4-3, formal charge on every oxygen atom and P-O bond order respectively are:
1.  -0.75 and 1.25
2.  -0.5 and 2
3.  1 and 1.5
4.  -0.75 and 2

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
 72%
From NCERT
AIPMT - 1998
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Increasing order of bond length is:

1. NO- < NO < NO+ < O2-

2. O2- < NO < NO- < NO+ 

3. O2- < NO- < NO< NO+ 

4. NO+ < NO < NO- < O2-

Subtopic:  M.O.T |
 65%
From NCERT
AIPMT - 1999
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The dipole moment of compound AB is 10.92 D and that of compound CD is 12.45 D. If the bond length of AB is 2.72 A° and that of CD is 2.56 A°, then for these compounds the correct statement is:
1.  More ionic nature in AB
2.  More ionic nature in CD
3.  Equal in both
4.  Cannot be predicted

Subtopic:  Polarity |
 74%
From NCERT
AIPMT - 1999
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Among the following, the compound that is electron deficient is:

1. BaCl2

2. BCl3

3. CCl4

4. PCl5

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
 83%
From NCERT
AIPMT - 2000
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dπ - pπ bond is present in:

1. CO32-

2. PO4-3

3. NO3-

4. NO2-

Subtopic:  Covalent Bond |
 87%
From NCERT
AIPMT - 2000
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The compound that forms linear polymer due to H-bond is:

1. H2O 2. NH3
3. HBr 4. HCl
Subtopic:  van der Waal Force & Hydrogen Bonding |
From NCERT
AIPMT - 2000
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The correct order of dissociation energy of N2 and N2+ is:

1. N2 > N2+ 2. N2 = N2+
3. N2+> N2 4. None of the above
Subtopic:  M.O.T |
 78%
From NCERT
AIPMT - 2000
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Among the options given below, identify the Isoelectronic species:

1. CO, CN, NO+, C22–

2. CO, CN, NO, C2

3. CO+, CN+, NO, C2

4. CO, CN, NO, C2

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
 87%
From NCERT
AIPMT - 2000
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A species that does not exhibit paramagnetism is:

1. N2+

2. O2

3. CO

4. NO

Subtopic:  M.O.T |
 79%
From NCERT
AIPMT - 2000
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