$2$-chlorobutane $+ Cl_2 \rightarrow C_4H_8Cl_2$ (isomers)
Total number of optically active isomers shown by $C_4H_8Cl_2$,obtained in the above reaction is......................

In $S_N2$ reactions,the correct order of reactivity for the following compounds: $CH_3Cl$,$CH_3CH_2Cl$,$(CH_3)_2CHCl$,and $(CH_3)_3CCl$ is:

Which of the following isomers of $C_4H_9Br$ is a chiral molecule?

The increasing order of reduction of alkyl halides with zinc and dil. $HCl$ is:

Given below are two statements:
Statement-$I$: High concentration of strong nucleophilic reagent with secondary alkyl halides which do not have bulky substituents will follow $S_{N}2$ mechanism.
Statement-$II$: $A$ secondary alkyl halide when treated with a large excess of ethanol follows $S_{N}1$ mechanism.
In the light of the above statements,choose the most appropriate from the options given below:

$CCl_4 + KOH$ (excess) $\rightarrow$ end product of the reaction is :