Among the following mixtures, dipole­-dipole as the major interaction, is present in

  • Option 1)

    Benzene and ethanol

  • Option 2)

    acetonitrile and acetone

  • Option 3)

    KCl and water

  • Option 4)

    benzene and carbon tetrachloride.

 

Answers (1)

As we learnt in

Dipole moment(µ) -

IT is vector sum of all the individual bond moments 

\bullet \:Mathematically\:\mu =q\times d

   q=magnitude\:of\:charge

   d=distance\:between\:the\:centres\:of\:opposite\:charge

- wherein

It is denoted by a small arrow with a tail on the positive centre and head pointing towards negative centre

    

    

     

 

 Molecule                Type of interaction

 Benzene                 Vandin waal force

 Ethanol                   dipole- dipole interaction

Acetonitrite               dipole- dipole interaction

 KCI                          Ionic bond

H2O                       dipole - dipole interaction

CCI4                         Vandin waal force

Between Acetonitrite and Acetoe the force of intraction is dipole - dipole Interaction.

Dipole­dipole interactions occur among the polar molecules. Polar molecules have permanent dipoles. The positive pole of one molecule is thus attracted by the negative pole of the other molecule. The magnitude of dipole­dipole forces in different polar molecules is predicted on the basis of the polarity of the molecules, which in turn depends upon the electronegativities of the atoms present in the molecule and the geometry of the molecule ( in case of polyatomic molecules, containing more than two atoms in a molecule )


Option 1)

Benzene and ethanol

This option is incorrect

Option 2)

acetonitrile and acetone

This option is correct

Option 3)

KCl and water

This option is incorrect

Option 4)

benzene and carbon tetrachloride.

This option is incorrect

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