Which of the following is/are the product$(s)$ of the given reaction?
$1$-chloro-$1$-ethyl-$2$-methylcyclohexane $\xrightarrow{C_2H_5O^-K^+ / \Delta}$ ?

Which of the following compounds is optically inactive?

Alkyl iodides on keeping become dark in color due to ...........

Which one of the following compounds will be least susceptible to the elimination of hydrogen bromide $(HBr)$?

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

Given below are two statements $:$
Statement $(I) :$ Alcohols are formed when alkyl chlorides are treated with aqueous potassium hydroxide by elimination reaction.
Statement $(II) :$ In alcoholic potassium hydroxide,alkyl chlorides form alkenes by abstracting the hydrogen from the $\beta-$carbon.
In the light of the above statements,choose the most appropriate answer from the options given below $:$