The final product obtained by distilling ethyl alcohol with an excess of chlorine and $Ca(OH)_2$ is:

Among the following organic halides,arrange them in the increasing order of their dehydrohalogenation reactions in the presence of alcoholic $KOH$:
$(A)$ $CH_3-CH_2-Br$
$(B)$ $CH_3-CH_2-CH_2-Br$
$(C)$ $CH_3-CH(Br)-CH_3$
$(D)$ $(CH_3)_3-CBr$

In the dehydrohalogenation of $2$-bromobutane,which conformation leads to the formation of $cis$-but-$2$-ene?

Which one is most reactive towards $S_{N}1$ reaction?

What is the product of the following reaction?

The correct sequence of reagents for the conversion of $X$ to $Y$ is :