MCQ
identify the rate of reaction of given compounds in $E_2$ reaction : 
- ✓$\text{a > b > c > d}$
- B$\text{a > c > b > d}$
- C$\text{b > a > c > d}$
- D$\text{b > d > a > c}$
✓
Answer
Correct option: A.
$\text{a > b > c > d}$
The rate of reaction depends on the leaving ability of halide ions.
Leaving Ability : $\mathrm{I}^{-} > \mathrm{Br}^{-} > \mathrm{Cl}^{-} > \mathrm{F}^{-}\ ($Acidic nature$).$
Strong acids act as a strong leaving groups.
Leaving Ability : $\mathrm{I}^{-} > \mathrm{Br}^{-} > \mathrm{Cl}^{-} > \mathrm{F}^{-}\ ($Acidic nature$).$
Strong acids act as a strong leaving groups.
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