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8.4. Organic chemistry reaction mechanism — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry8.4. Organic chemistry reaction mechanism1 Mark
MCQ
When benzene diazonium chloride treated with $\beta -$ naphthol in alkaline medium a coupling reaction takes place and result into formation of azodye. In this reaction benzene diazonium chloride act as
  • A
    Electrophile
  • B
    Nucleophile
  • C
    Free radical
  • ✓
    None of these
✓

Answer

Correct option: D.
None of these
d
$-\mathrm{CH}_3$ shows $+\mathrm{M}$ and $+\mathrm{I}$.

$-\mathrm{Cl}$ shows $+\mathrm{M}$ and $-\mathrm{I}$ but inductive effect dominates.

$-\mathrm{NO}_2$ shows $-\mathrm{M}$ and $-\mathrm{I}$.

Electrophilic substitution $\alpha \frac{1}{-\mathrm{M} \text { and }-\mathrm{I}}$

$\alpha+\mathrm{M} \text { and }+\mathrm{I}$

Hence, order is $\mathrm{B}>\mathrm{A}>\mathrm{C}>\mathrm{D}$.

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