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Arrange in the order of increassing dipo...

Arrange in the order of increassing dipole moment
I. toluene
II. m-dichlorobenzen
III. o-dichlorobenzene
IV.p-dichlorobenzee

A

IltIVltIIltIII

B

IVltIltIIltIII

C

IVltIltIIIltII

D

IVltIIltIltIII

Text Solution

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The correct Answer is:
B
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Covalent molecules formed by heteroatoms bound to have some ionic character. The ionic character is due to shifting of the electron pair towards A or B in the molecule AB. Hence, atoms acquire small and equal charge but opposite in sign. Such a bond which has some ionic character is described as polar covalent bond. Polar covalent molecules can exhibit dipole moment. Dipole moment is equal to the product of charge separation, q and the bond length, d for the bond. The unit of dipole moment is Debye. One Debye is equal to 10^(-18) esu cm. Dipole moment is a vector quantity. It has both magnitude and direction. Hence, dipole moment of molecules depends upon the relative orientation of the bond dipoles, but not on the polarity of bonds alone. A symmetrical structure shows zero dipole moment. Thus, dipole moments help to predict the geometry of the molecules. Dipole moment values can be used to distinguish between cis-and traps-isomers, ortho-, meta-and para-forms of a substance, etc. The percentage of ionic character of a bond can be calculated by the application of the following formula : % " ionic character " = ("Experimental value of dipole moment ")/("Theoretical value of dipole moment ") xx 100 Arrange the following compounds in increasing order of dipole moments, toluene (I), o- dichlorobenzene (II), m-dicblorobenzene (III) and p dichlorobenzene (IV) :

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AAKASH SERIES-CHEMICAL BONDING-OBJECTIVE EXERCISE -2(DIPOLE MOMENT )
  1. Dipole moment of H2 X is 1.0 D. If the bond angle is 90^@, the approxi...

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  2. The dipoleoment of HX is 1.2D. If the % ionic character of the bond is...

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  3. Which bond angle theta would result in the maximum dipolemoment for th...

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  4. From the following dipole moment (in Debye) values of methyl halides, ...

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  5. A: Water molecule has zero dipole moment R: In water molecule dipole ...

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  6. The dipole moment of BF(3) is zero because

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  7. If a molecule MX(3) has zero dipole moment the sigma bonding orbitals ...

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  8. Bent molecule having dipole moment among the following

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  9. Which one of the following mu=0

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  10. The difference of electronegativity between X and Y is 2. If X and Y f...

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  11. Arrange in the order of increassing dipole moment I. toluene II. m...

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  12. Whcin bond is most polar?

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  13. The dipoleoment of HX is 1.2D. If the % ionic character of the bond is...

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  14. The following are some statements about dipole moment. i. The dipole...

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  15. Which of the following is more stable

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  16. For which of the following molecule significat mu!=0?

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  17. The table shown lists the bond dissociation energies (E("diss")) for s...

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  18. The number and type of bonds between two carbon atoms in CaC(2) are

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  19. From the following give statements of the order of dipolemoments. (i...

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  20. KF combines with HF to form KHF(2). The compound contains the species

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