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Geometrical Isomerism

Cis isomer ha...

Question

Cis isomer have:

A

None of the above

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B

Same boiling point

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C

Lower boiling point than trans isomer

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D

High boiling point than trans isomer

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Solution

The correct option is D
High boiling point than trans isomer

Cis isomer have high boiling point than trans isomer due to high polarity.

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Similar questions

Q. Why boiling point of cis isomer is greater than trans isomer?

Q. What is dipole moment? Why do cis-trans isomers have different boiling point?

Q. First, you name both the compounds. Yes, both of them have the same name. Yet, are they really the same structure, or they are somehow different? Careful inspection should convince you that they are indeed different. Now, how their physical and chemical properties differ? Generally,
i) Cis-isomer has more dipole moment than trans-isomer.
ii) Cis is less stable than trans.
iii) The boiling points of cis isomers are more than those of trans isomers (remember boiling points are directly related to polarity which is determined by dipole moment).
iv) Chemical reactivities of cis and trans also differ from each other.

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

C H_{3} - C H = C H - C H_{3} (c i s)

C H_{3} - C H = C H - C H_{3} (t r a n s)

C H_{3} - C H = C H C l (c i s)

C H_{3} - C H = C H C l (t r a n s)

Q. Which one of the following reason is responsible for lower melting point of cis isomer than trans-isomer?

Q. First, you name both the compounds. Yes, both of them have the same name. Yet, are they really the same structure, or they are somehow different? Careful inspection should convince you that they are indeed different. Now, how their physical and chemical properties differ? Generally,
i) Cis-isomer has more dipole moment than trans-isomer.
ii) Cis is less stable than trans.
iii) The boiling points of cis isomers are more than those of trans isomers (remember boiling points are directly related to polarity which is determined by dipole moment).
iv) Chemical reactivities of cis and trans also differ from each other.
Which of the following statements best explain(s) the relationship between two isomers of

C H_{3} - C H = C H - C H_{3}

?

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