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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Out of o-and p-dibromobenzene which one has higher melting point and why? - Chemistry

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प्रश्न

Out of o-and p-dibromobenzene which one has higher melting point and why?

टीपा लिहा
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उत्तर

 p-Dibromobenzenc has higher melting point than its o-isomer.

It is due to symmetry of p-isomer which fits in crystal lattice better than the o-isomer.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 10: Haloalkanes and Haloarenes - Exercises [पृष्ठ १४२]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 10 Haloalkanes and Haloarenes
Exercises | Q III. 45. | पृष्ठ १४२

संबंधित प्रश्‍न

Give reasons : n-Butyl bromide has higher boiling point than t-butyl bromide.


Arrange the set of compounds in order of increasing boiling points.

Bromomethane, Bromoform, Chloromethane, Dibromomethane.


Arrange the set of compounds in order of increasing boiling points.

1-Chloropropane, Isopropyl chloride, 1-Chlorobutane.


p-Dichlorobenzene has higher m.p. and lower solubility than those of o- and m-isomers. Discuss.


Which of the following compounds has the highest boiling point?


Which of the following halide is 2°?


Which of the following is liquid at room temperature (b.p. is shown against it)?


Which of the following possesses the highest melting point?


p-dichlorobenzene has a higher melting point than its o- and m-isomers because ____________.


Arrange the following compounds in the increasing order of their densities.

(a)

(b)

(c)

(d)


Arrange the following compounds in increasing order of their boiling points.

(a)  \[\begin{array}{cc}
\ce{CH3}\phantom{..................}\\
\backslash\phantom{...........}\\
\ce{CH - CH - CH2Br}\\
/\phantom{.............}\\
\ce{CH3}\phantom{..................}
\end{array}\]

(b) \[\ce{CH3CH2CH2CH2Br}\]

(c) \[\begin{array}{cc}
\phantom{...}\ce{CH3}\\
\phantom{}|\\
\ce{H3C - C - CH3}\\
\phantom{}|\\
\phantom{..}\ce{Br}
\end{array}\]


Assertion: The boiling points of alkyl halides decrease in the order:

RI > RBr > RCl > RF

Reason: The boiling points of alkyl chlorides, bromides and iodides are considerably higher than that of the hydrocarbon of comparable molecular mass.


Why is the boiling point of o-dichlorobenzene higher than p-dichlorobenzene, but the melting point of para-isomer is higher than ortho-isomer?


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


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


Write the structure of the following organic halogen compound.

4-tert-Butyl-3-iodoheptane


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