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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पाठ 6: Haloalkanes and Haloarenes - Exercises [पृष्ठ १९०]
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संबंधित प्रश्न
Give reasons : n-Butyl bromide has higher boiling point than t-butyl bromide.
Explain why alkyl halides, though polar, are immiscible with water?
Define racemic mixture.
For the same alkyl group, an alkyl bromide has a higher boiling point than alkyl fluoride because:
Which of the following compounds has the highest boiling point?
Which of the following halide is 2°?
The decreasing order of boiling points of alkyl halides is:
Which of the following possesses the highest melting point?
Mg reacts with RBr best in ____________.
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
Out of o-and p-dibromobenzene which one has higher melting point and why?
Which of the following compounds will have the highest melting point and why?
| (I) |  |
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(II) |
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| (III) |  |
Arrange the following compounds in increasing order of their boiling points:
CH3CH2OH, CH3−CHO, CH3−COOH
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
Name the following halides according to the IUPAC system and classify them as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halide:
\[\ce{CH3 C(C2H5)2CH2Br}\]
