Thionyl chloride is preferred in the preparation of chloro compound from alcohol since:

both the by products are gases and they escape out leaving product in pure state

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it is a chlorinating agent

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it is a oxidising agent

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all other reagent are unstable

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Solution

The correct option is A both the by products are gases and they escape out leaving product in pure state
$R - O H + S O C l_{2} \to R - C l + S O_{2} (g a s) + H C l (g a s)$

Option A is correct.

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The thionyl chloride method is preferred over hydrogen chloride or phosphorous chloride method for the preparation of haloalkanes because both the by-products (SO₂ and HCl) in this case are gases and escape leaving behind pure chloroalkane. This reaction takes place in the presence of

Thionyl chloride is preferred in the preparation of chlorine compounds from alcohols because:

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Reason: Phosphorus chlorides give pure alkyl halides.
[1 Mark]

Q. Give reasons:
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2. Tert-butyl bromide has lower bioling point than n-butyl bromide
3. although alkyl halides are polar in nature they are not soluble in water

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Thionyl chloride is preferred in the preparation of chloro compound from alcohol since:

The correct option is A both the by products are gases and they escape out leaving product in pure stateR−OH+SOCl2→R−Cl+SO2(gas)+HCl(gas)Option A is correct.

The correct option is A both the by products are gases and they escape out leaving product in pure state
$R - O H + S O C l_{2} \to R - C l + S O_{2} (g a s) + H C l (g a s)$

Option A is correct.