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Haloalkanes and Haloarenes

Short Answer Type

21.

Arrange each set of compounds in order of increasing boiling points:

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22.

In the following pairs of halogen compounds, which compound undergoes faster S_N1 reaction?

and

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23.
In the following pairs of halogen compounds, which compound undergoes faster S_N1 reaction?

Greater the stability of the carbocation, faster is the rate of S_N1 reaction. Since secondary carbocation 2-chloroheptane is more stable than primary carbocation 1-chlorohexane. Hence S_N2 reaction proceed via secondary cation such as 2-chloroheptane.

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24. Identify A, B, C, D, E, R and R’ in the following:

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25. Write IUPAC name of the following: Tert-butyl chloride.

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26. What are polyhalogen compounds? Give two examples.

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27.

Write the IUPAC name of chloroform.

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28.

Write IUPAC name of iodoform.

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29.

Thionyl chloride is preferred in the preparation of chloro alkanes from alcohol. Give reason.

$stack straight R space minus space OH with Alcohol below space plus space SOCl subscript 2 space space rightwards arrow space space space space stack straight R minus Cl with Haloalkane below space plus space stack left parenthesis SO subscript 2 plus HCl right parenthesis with Gaseous space by space products below$