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271.

Arrange the following compounds in increasing order of S_N1 , respectively.

(CH₃)₃CCI, C₆H₅(CH₃)₂Cl, CH₃CH₂CH₂Cl

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272.

What are the structure of the possible isomes of dichloroethane? Which of them will have zero dipole movement?

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273.

Arrange the following alkyl halides in the decreasing order of S_N2 reactivity.

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274.

Give reasons:
Iodoform is obtained by the reaction of acetone with hypoidodide ion and not with iodide ion.

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275. Give reasons:

Dry gaseous hydraulic acid and not their aqueous solutions are used to prepare alkyl halides from alkenes.

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When 1-chloro ethane is treated with alc. KOH, it produce ethene which on further reaction with potassium permangnet gives 1,2 ethane diol.

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277.

How will you prepare 1-bromo propane from 2-bromo propane?

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278.

How will you prepare 1-bromo propane from 1-chloro propane?

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279. Start from chlorobenzene how will you obtain Toluene.

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280. Start from chlorobenzene how will you obtain Phenol.

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