Hydrocarbons

Short Answer Type

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Draw the cis and trans structures of hex-2-ene. Which isomer will have higher b.p. and why?

Hex-2-ene has the following cis and trans structures:



cis isomer possesses higher boiling point due to the greater magnitude of dipole-dipole interactions as compared to the trans isomer.


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    Draw cis and trans isomers of the following compounds. Also, write their IUPAC names:

    (i) CHCl = CHCl

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    Which of the following compounds will show cis-trans isomerism?

    (i)(CH3)2C = CH-C2H5
    (ii) CH2 = CBr2
    (iii) C2H5CH = CH-CH2
    (iv) CH3CH = CClCH3 

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    Long Answer Type

    How will you explain that there exists two varieties of 1, 2,-dichloroethene while there is only one type of 1, 2-dichloroethane?

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    Short Answer Type

    Which of the following compounds would show geometrical isomerism? Draw the isomeric structures to support your answer:
    (i) But-2-ene
    (ii) Pent-1-ene
    (iii) 2-Methyl-But -2-ene
    (iv) 3, 4-Dimethyl-hex-3-ene
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    Out of the two - trans-but-2-ene and cis-but-1-ene, which is more stable and why

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