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4 September, 02:57

Which substance below has dipole-dipole forces co2, ch4, h2s, f2?

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  1. 4 September, 03:35
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    Dipole moment is a vector quantity and is equal to charge multiplied by distance. When a molecule is symmetrical (repeat its face when rotated at 180°) then the dipole moments present in it will cancel out each other making the molecule non polar. In given examples,

    CO₂ has zero dipole moment as it has linear structure and both dipoles cancel out each other.

    CH₄ has a symmetrical Tetrahedral structure, it also cancel out all dipole moments making the molecule non polar with zero dipole moment.

    H₂S has a bent structure and a dipole moment of 0.95 D. As the sulfur contains 2 lone pair of electrons, so lone pair of electrons contribute in dipole moment.

    F₂ is also non polar and symmetrical, so the net dipole moment of this molecule is zero.
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