The major product of the following reaction is:

Pure $CHCl_3$ and pure $CHI_3$ can be distinguished by which of the following?

Which is the correct reaction coordinate diagram for the following solvolysis reaction?

Arrange the compounds of each set in order of reactivity towards $S_{N}2$ displacement:
$(i)$ $2-Bromo-2-methylbutane$,$1-Bromopentane$,$2-Bromopentane$
$(ii)$ $1-Bromo-3-methylbutane$,$2-Bromo-2-methylbutane$,$2-Bromo-3-methylbutane$
$(iii)$ $1-Bromobutane$,$1-Bromo-2,2-dimethylpropane$,$1-Bromo-2-methylbutane$,$1-Bromo-3-methylbutane$.

Which of the following compounds is formed when chloroform $(CHCl_3)$ is exposed to air and light?

Elimination reactions (especially $\beta$-elimination) are as common as the nucleophilic substitution reaction in the case of alkyl halides. Specify the reagents used in both cases.