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Haloalkanes and Haloarenes

Short Answer Type

381. Give one important uses of each of the following:
(i) BHC (ii) Freon (iii) D.D.T.

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382.

Complete the following reactions:

$bold CH subscript bold 3 bold CH subscript bold 2 bold CH subscript bold 2 bold Br bold space bold rightwards arrow with bold alc bold. bold space bold KOH on top$

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383.

Complete the following reactions:

$bold CH subscript bold 3 bold Br bold rightwards arrow from bold KOH to bold H subscript bold 2 bold O bold divided by bold H to the power of bold plus of$

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384.

Complete the following reactions:

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385.

Complete the following reactions:

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386.
How is pure chloroform prepared? How is it oxidised in air or sunlight?

In industry, chloroform is produced by heating a mixture of chlorine or methane. At 400–500 °C, a free radical halogenation occurs, converting these precursors to progressively more chlorinated compounds:

CH₄ + Cl₂ → CH₃Cl + HCl

CH₃Cl + Cl₂ → CH₂Cl₂ + HCl

CH₂Cl₂ + Cl₂ → CHCl₃ + HCl

Chloroform is slowly oxidised by air in the presence of light to an extremely poisonous gas, carbonyl chloride known as phosgene.