An alkyl bromide $(X)$ reacts with sodium in ether to form $4,5-$diethyl octane. The compound $X$ is:

What is the major product formed in the following reaction?

Correct order of nucleophilicity for $S_N2$ reaction

Given below are two statements:
Statement $I$: The conversion $CH_3-CH_2-CH_2-CH_2-Cl \xrightarrow{OH^{-}} CH_3-CH_2-CH_2-CH_2-OH + Cl^{-}$ proceeds well in a less polar medium.
Statement $II$: The conversion $(CH_3)_3C-Cl \xrightarrow{OH^{-}} (CH_3)_3C-OH + Cl^{-}$ proceeds well in a more polar medium.
In the light of the above statements,choose the correct answer from the options given below.

$ . . . . . . $ compound is slowly oxidized by air in the presence of light to an extremely poisonous gas,carbonyl chloride.

Which of the following statements is correct regarding the rate of hydrolysis of the compounds $(A)$ and $(B)$ by $S_N1$ reaction?