Which of the following has been arranged in order of decreasing dipole moment?
A
CH3Cl>CH3F>CH3Br>CH3I
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B
CH3F>CH3Cl>CH3Br>CH3I
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C
CH3Cl>CH3Br>CH3I>CH3F
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D
CH3F>CH3Cl>CH3I>CH3Br
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Solution
The correct option is DCH3Cl>CH3F>CH3Br>CH3I
DipoleMoment=Charge×Distance
Dipole moment depends on the electronegativity of the elements as it is the product of charge on one of the ions and the distance between them. The dipole moment of CH3Cl is greater than CH3F due to more charge separation.