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JEE Main20207 Jan 2020Morning ShiftChemistryChemical Bonding and Molecular StructureActual

The dipole moments of C C l 4 , C H C l 3 and C H 4 are in the order

Options

  1. AC H C l 3 < C H 4 = C C l 4
  2. BC C l 4 < C H 4 < C H C l 3
  3. CC H 4 < C C l 4 < C H C l 3
  4. DC H 4 = C C l 4 < C H C l 3

Correct answer

D. C H 4 = C C l 4 < C H C l 3

Step-by-step solution

In CHCl 3 , dipole moment of C - H is added to the resultant dipole moment of three C - Cl bonds, hence compound has non-zero value of dipole moment. Electronegativity of carbon = 2 . 5 Electronegativity of hydrogen = 2 . 1 . Elelctrongegativity of C = 2 . 5 Electronegativity of Cl = 3 Due to symmetry and similar bonds, vector summation of net dipole moments of both CH 4 , &#160; CCl 4 are zero, hence equal.

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