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  • The molecule having smallest bond angle is :Option: 1 NCl3Option: 2 AsCl3</

The molecule having smallest bond angle is :

Option: 1

NCl3


Option: 2

AsCl3


Option: 3

SbCl3


Option: 4

PCl3


Answers (1)

best_answer

As we discussed in the concept

VSEPR Theory -

1.  The shape of the molecule is determined by repulsions between all of the electron pair present in valence shell.

2.  Order of repulsion 

             lone \:pair-Lone\: pair> Lone\:pair-Bond\:pair> Bond\:pair-bond\:pair

3  Repulsion among the bond pair is directly proportional to the bond  order and electronegativity difference between the central atom and the other atom.

-

 

 As we move down the group the size of atom increases and as size of central atom increases lone pair-bond pair repulsion also increases. Thus bond angle decreases.

Increasing order of atomic radius :

N< P< As< Sb

Decreasing order of bond angle :

NCl_{3}> PCl_{3}> AsCl_{3}> SbCl_{3}

Posted by

sudhir.kumar

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