Determine the number of chiral products (including stereoisomers) formed upon $E_2$ elimination of the given substrate with $alc. KOH$.

Select the reagent that will yield the greater amount of substitution on reaction with $CH_3CH_2Br$.

At $30\,^\circ C$,the rate of reaction between $2$-bromobutane and $OH^-$ in $75\%$ ethanol and $25\%$ water is given by: $\text{Rate} = 3.20 \times 10^{-5} [2\text{-bromobutane}][OH^-] + 1.5 \times 10^{-6} [2\text{-bromobutane}]$. If $[OH^-] = 1.0\,M$,what percentage of the reaction proceeds via the $S_N2$ mechanism?

The reaction of $1$-chlorobutane with alcoholic $KOH$ yields .....

What is the correct decreasing order of the relative rate of solvolysis for the following alkyl halides in formic acid containing a small amount of water?
$(I) \ CH_2=CH-CH_2Cl$
$(II) \ CH_2=CH-CH(CH_3)Cl$
$(III) \ CH_2=C(CH_3)CH_2Cl$
$(IV) \ CH_3CH=CH-CH_2Cl$

Vicinal and geminal dihalides can be distinguished by using: