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When 1,3-Dibromopropane or trimethylene dibromide is heated with zinc, it forms cyclopropane.

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372. Why alkyl halide has the highest density then water and why?

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373.

How will you obtain 2-bromopropane from propene?

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374. Account for the following observation:
The boiling point of ethyl bromide is higher than that of ethyl chloride.

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375.

Account for the following observation:
n-propyl chloride boils at a high temperature than methyl chloride.

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376.

Account for the following observation:
Haloalkanes are denser than the corresponding hydrocarbons.

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377. Explain the following terms:
(i) Nucleophile (ii) Nucleophilic reagent and (iii) Nucleophilic substitution.

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378. How will you distinguish between Vinyl chloride and ethyl chloride.

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379. How will you distinguish between Chlorobenzene and cyclohexyl chloride.

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380. How will you distinguish between Ethyl chloride and ethyl bromide.

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