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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3cb163

Which of the following statements is/are correct?

  1. AA molecule containing polar bonds can have zero dipole moment
  2. BFor identical polar groups on a C=C bond, the cis isomer has a dipole moment greater than or equal to that of the trans isomer
  3. CDipole moment is a scalar quantity
  4. DA molecule has zero dipole moment only if it is linear

Answer: A, B

(A) true, e.g. . (B) true: for the cis form the bond dipoles add, while for the trans form they partly or fully cancel. (C) false: dipole moment is a vector. (D) false: and are non-linear with zero dipole.
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