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 |
 66%
From NCERT
AIPMT - 1999
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H2O is dipolar, whereas BeF2 is not. It is because:
 

1. H2O involves hydrogen bonding whereas BeF2 is a discrete molecule.
2. H2O is linear and BeF2 is angular.
3. H2O is angular and BeF2 is linear.
4. The electronegativity of F is greater than that of O
Subtopic:  Polarity |
 76%
From NCERT
AIPMT - 2004
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In a regular octahedral molecule, MX6, the number of X–M–X bonds at 180º is:

1. Two 2. Six
3. Four 4. Three
Subtopic:  Hybridisation |
 70%
From NCERT
AIPMT - 2004
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The lone pairs in the BrF3 molecule, occupy equatorial positions to minimize:

1. Bond pair – bond pair repulsion only
2. Lone pair – lone pair repulsion and lone pair–bond pair repulsion
3. Lone pair–lone pair repulsion only
4. Lone pair–bond pair repulsion only
Subtopic:  V.S.E.P.R & V.B.T |
 75%
From NCERT
AIPMT - 2004
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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, iso-electronic species are:

1. CO2, NO2

2. NO2-, CO2

3. CN, CO

4. SO2, CO2

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
 84%
From NCERT
AIPMT - 2002
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 pπ-dπ bonding is present in:

1. NO3-

2. SO3-2

3. BO3-3

4. CO3-2

Subtopic:  Covalent Bond |
 86%
From NCERT
AIPMT - 2002
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In NO3 ion, the number of bond pair and lone pair of electrons on nitrogen atom are respectively:

1. 2, 2 2. 3, 1
3. 1, 3 4. 4, 0
Subtopic:  Covalent Bond |
 67%
From NCERT
AIPMT - 2002
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Incorrect statement about peptide bond is:
 

1. C–N bond length in proteins is longer than the usual bond length of N-bond.
2. Spectroscopic analysis shows the planar structure of  group. 
3. C–N bond length in proteins is smaller than the usual bond length of the C–N bond.
4. None of the above.
Subtopic:  Hybridisation |
From NCERT
AIPMT - 2001
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Which of the following two species in the pair are isostructural:

1.  XeF2 , IF2-

2. NH3 , BF3

3.  CO3-2 , SO3-2

4. PCl5 , ICI5

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
 85%
From NCERT
AIPMT - 2001
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