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Which of the following fluorides of Xe has zero dipole moment ?A. `XeF_(2)`B. `XF_(6)`C. `XeF_(4)`D. Both A & C. |
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Answer» Correct Answer - D `XeF_(2)` has a linear structure `therefore` its dipole is zero. In `XeF_(4)`, the four F atoms be at the corners of a square `therefore` their individual bond moments cancel each other. Further, since the two lone pairs lie at axial positions `therefore` their dipole moments also cancel each other and hence `XeF_(4)` has zero dipole moment. The only structure which is not symmetrical is `XeF_(6)` which has a finite dipole moment. `therefore XeF_(2)` and `XeF_(4)` have zero dipole moments `therefore` option is true. |
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