In the given reaction $3-$Bromo$-2,2-$dimethylbutane $\xrightarrow{C_2H_5OH}$ (Major product) $'A'$. Product $A$ is:

Which of the following has the highest reactivity for $S_N2$ reactions?

Given below are two statements $:$
Statement $(I) :$ $cis-1,2-dichloroethene$ is more polar than $cis-1,2-dibromoethene$.
Statement $(II) :$ Boiling point of $trans-1,2-dibromoethene$ is lower than $cis-1,2-dibromoethene$ but it is more polar than $cis-1,2-dibromoethene$.
In the light of the above statements,choose the most appropriate answer from the options given below $:$

Addition of $KI$ accelerates the hydrolysis of primary alkyl halides because

The product formed on the reaction of ethyl alcohol with bleaching powder is:

In the given pairs of alkyl halides,in which pair is the first compound more reactive than the second compound toward $S_N2$ reaction?