MCQ
Among the followings which will readily undergo ${{S}_{{{N}^{2}}}}$ reaction ?
- A$4-$ Chlorobut $-1-$ ene
- B$1-$ Chlorobut $ -1-$ ene
- ✓$1-$ Chlorobut $-2-$ ene
- D$2-$ Chlorobut $- 1-$ ene
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$2PhCHO \xrightarrow{{:\mathop O\limits^ \ominus H}}PhC{H_2}OH + PhC\mathop {O_2^ \ominus }\limits^{.\,\,.\,\,} $
the slowest step is :
