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6. Haloalkanes and Haloarenes — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry6. Haloalkanes and Haloarenes1 Mark
MCQ
Best method of preparing alkyl chloride is
  • ✓
    $ROH + SOC{l_2}\xrightarrow{{\;\;\;\;\;\;\;\;\;}}$
  • B
    $ROH + PC{l_5}\xrightarrow{{\;\;\;\;\;\;\;\;\;\;\;\;}}$
  • C
    $ROH + PC{l_3}\xrightarrow{{\;\;\;\;\;\;\;\;\;\;\;\;}}$
  • D
    $ROH + HCl\xrightarrow{{{\text{anhy}}{\text{. }}ZnC{l_2}}}$
✓

Answer

Correct option: A.
$ROH + SOC{l_2}\xrightarrow{{\;\;\;\;\;\;\;\;\;}}$
a
(a) The chlorination of alcohol by $SOC{l_2}$ (thionyl chloride) is the best method for the preparation of alkyl halides as in this method all the other product are gaseous and thus halides are obtained on quite pure state

$R - OH + SOC{l_2}\xrightarrow{\Delta }R - Cl + HCl \uparrow  + S{O_2} \uparrow $

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