The melting point of p-dichlorobenzene is higher than that of its ortho- and meta-isomers due to its highly symmetrical structure. This symmetry allows the molecules to pack more efficiently and tightly in the crystal lattice, forming a more stable and orderly solid. As a result, stronger intermolecular forces hold the molecules together, and more energy (heat) is required to break these interactions during melting. In contrast, the less symmetrical o- and m-isomers pack less efficiently, have weaker intermolecular forces, and thus melt at lower temperatures.
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प्रश्न
p-Dichlorobenzene has higher m.p. and lower solubility than those of o- and m-isomers. Discuss.
Why p-dichlorobenzene has higher melting point than those of ortho and meta-isomers?
p-Dichlorobenzene has higher m.p. than those of o- and m-isomers. Discuss.
Why is the melting point of p-dichlorobenzene higher than that of o- and m-isomers?
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उत्तर
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पाठ 6: Haloalkanes and Haloarenes - Exercises [पृष्ठ १९०]
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संबंधित प्रश्न
Define racemic mixture.
How many structural isomers are possible for a compound with the molecular formula C3H7Cl?
Which of the following halide is 2°?
Mg reacts with RBr best in ____________.
Arrange the following compounds in the increasing order of their densities.
(a)
(b)
(c)
(d)
Which is the correct increasing order of boiling points of the following compounds?
1-Iodobutane, 1-Bromobutane, 1-Chlorobutane, Butane
Which is the correct increasing order of boiling points of the following compounds?
1-Bromoethane, 1-Bromopropane, 1-Bromobutane, Bromobenzene
Which of the following compounds will have the highest melting point and why?
| (I) |  |
|
(II) |
 |
| (III) |  |
Which out of the following is an intensive property?
Arrange the following compounds in increasing order of their boiling points:
CH3CH2OH, CH3−CHO, CH3−COOH
Why alkyl halides though polar are immiscible with water?
Arrange the isomeric dichlorobenzene in the increasing order of their boiling point and melting points.
Write the structure of the following organic halogen compound.
4-tert-Butyl-3-iodoheptane
Write the structure of the following organic halogen compound.
4-tert-Butyl-3-iodoheptane
Name the following halides according to the IUPAC system and classify them as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halide:
\[\ce{CH3 C(C2H5)2CH2Br}\]
Write the structure of the following organic halogen compound.
4-tert-Butyl-3-iodoheptane
