Arrange each set of compounds in order of increasing boiling po

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 Multiple Choice QuestionsShort Answer Type

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21.

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









Both of the alkyl halides are primary. However, the substituent CH3 is at a greater distance to the carbon atom linked to Br in 1- bromo-3-methylbutane than in 1-bromo-2-methylbutane. Therefore, the approaching nucleophile is less hindered in case of the 1-bromo-3-methylbutane than in case of the 1-bromo-2-methylbutane. Hence, 1-bromo-3-methylbutane reacts faster than the latter by SN2 mechanism.




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22.

In the following pairs of halogen compounds, which compound undergoes faster SN1 reaction?

         and        

 

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23.

In the following pairs of halogen compounds, which compound undergoes faster SN1 reaction?

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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

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30. Give a convenient method of preparation of iodoalkanes.
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