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Example-1

Example-1
The dipole moment of HBr is 1.6 × 10–30 cm and interatomic spacing is 1 Å. The % ionic character of HBr is:
  1. 7
  2. 10
  3. 15
  4. 27
Solution (b)
Charge of Description: 16050.png
 
Dipole moment of Description: 16059.png
 
Interatomic spacing Description: 16066.png
 
% of ionic character inDescription: 16073.png
 

Example-2

Example-2
Among the following metal carbonyls, the C–O bond order is lowest in:
  1. [Mn(CO)6]+
  2. [Fe(CO)5]
  3. [Cr(CO)6]
  4. [V(CO)6]
Solution (d)
  1. [Mn(CO)6]+; Mn+ = 3d54s1 . 3d6 = d2sp3 hybridized
  2. [Fe(CO)5]; Fe = 3d64s2 . 3d8 = dps3 hybridized
  3. [Cr(CO)6]; Cr = 3d54s1 . 3d6 = d2sp3 hybridized
  4. [V(CO)6]
     
    V = 3d34s2
     
    V = 3d6 = d2sp3 hybridized
     
    V have greater negative charge density and hence can easily back donate.
     
    Therefore, C—O bond order is lowest.

Example-3

Example-3
The species having bond order different from that in CO is:
  1. NO
  2. NO+
  3. CN
  4. N2
Solution (A)
CO = Description: 16162.png
BO3 = 3
 
Description: 16173.png
BO3 = 2
 
Description: 16181.png
BO3 = 3
 
Description: 16189.png
BO3 = 3
 
Description: 16200.png
BO3 = 3
 




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