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Haloalkanes and Haloarenes — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryHaloalkanes and Haloarenes1 Mark
MCQ
Which of the following is halogen exchange reaction?
  • ✓
    $\text{RX}+\text{NaI}\xrightarrow{ \ \ \ \ \ \ \ \ \ \ }\text{RI + NaX}$
  • B
  • C
    $\text{R}-\text{OH + HX}\xrightarrow{\ \ \text{ZnCl}_2\ \ }\text{R}-\text{X + H}_2\text{O}$
  • D
✓

Answer

Correct option: A.
$\text{RX}+\text{NaI}\xrightarrow{ \ \ \ \ \ \ \ \ \ \ }\text{RI + NaX}$
Halogen exchange reactions are those reactions in which one halide replaces another. This reaction is known as Finkelstein reaction. In
  1. Halogen $(-X)$ is replaced by iodine.
  2. Addition of hydrogen halide on alkene.
  3. Halogen replaces alcoholic group.
  4. Halogen replaces the hydrogen of benzoic ring.

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