Topic: Chemical Bonding

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Q:

(a) :  1
(b) :  2
(c) :  3
(d) :  4
Answer:  1
Explanation:  
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Q:

(a) :  Electrovalent and covalent
(b) :  Electrovalent and coordinate
(c) :  Electrovalent, covalent and coordinate
(d) :   Covalent and coordinate
Answer:  Electrovalent, covalent and coordinate
Explanation:  
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Q:

(a) :  A
(b) :  B
(c) :  C
(d) :  D
Answer:  A
Explanation:  
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Q:

The type of hybrid orbitals used by the chlorine atom in 2 ClO is

(a) :  sp
(b) :   2 sp
(c) :  sp
(d) :  None of these
Answer:  sp
Explanation:  

Chlorine atom in 2 ClO is 3 sp hybridised but its shape is angular.


Q:

The values of electronegativity of atoms A and B are 1.20 and 4.0 respectively. The percentage of ionic character of A – B bond is

(a) :  50 %
(b) :   43 %
(c) :  55.3 %
(d) :   72.24%
Answer:   72.24%
Explanation:  
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Q:

(a) :  3
(b) :  2
(c) :  1
(d) :  0
Answer:  0
Explanation:  
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Q:

The correct order of dipole moment is 

(a) :  
(b) :  
(c) :  
(d) :  
Answer:  40914_option0_ click to enlarge
Explanation:  
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Q:

Which of the following arrangement of molecules is correct on the basis of their dipole moments

(a) :  
(b) :  
(c) :  
(d) :  
Answer:  40915_option3_cccccccc.png click to enlarge
Explanation:  

Ammonia molecule is more basic than nitrogen trifluoride and Boron trifluoride because ammonia molecule easily gives lone pair of electron


Q:

Arrange the following compounds in order of increasing dipole moment (I) Toluene (II) m  dichlorobenzene (III) o  dichlorobenzene (IV) p  dichlorobenzene<

(a) :  I < IV < II < III
(b) :   IV < I < II < III
(c) :   IV < I < III < II
(d) :  IV < II < I < III
Answer:   IV < I < II < III
Explanation:  

The correct order of increasing dipole moment is p-dichlorobenzene < Toluene < m-dichlorobenzene < odichlorobenzene


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