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Why is the total dipole moment of the non-polar molecule is zero?

Why is the total dipole moment of the non-polar molecule is zero? Correct Answer <p>because the centre of positive and negative charges coincides </p>

CONCEPT: 

  • There two types of molecules, polar and non-polar molecules
    • Polar molecules are molecules in which the centre of positive and negative charge doesn't coincide with one another. 
    • Non-polar molecules are molecules in which the centre of positive and negative charge coincide with one another.
    • Molecules formed upon the bonding of two same elements are homo diatomic molecules

EXPLANATION:

  • Non-polar molecules are molecules in which the centre of positive and negative charge coincide with one another.
  • Since the centre of positive and negative charges coincides with one another, thus these molecules have zero dipole moment. Hence option 2 is the answer
  • Polar molecules are molecules in which the centre of positive and negative charge doesn't coincide with one another. 

Additional Information

  • Since the centre of positive and negative charges don't coincide with one another these molecules have non zero diploe moment. 
  • The diploe moment of a homo diatomic molecule and symmetric top molecules is zero.

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