$1-$chlorobutane reacts with alcoholic $KOH$ to form

$1$-methyl ethylene oxide (propylene oxide) when treated with an excess of $HBr$ produces:

The increasing order of densities of the following alkyl halides is:
$(I)$ $n-C_3H_7Br$
$(II)$ $n-C_3H_7Cl$
$(III)$ $n-C_3H_7I$

The reaction of $n$-propyl bromide with ethanolic potassium hydroxide $(KOH)$ produces ...... .

$A$ haloalkane undergoes $S_{N}2$ or $S_{N}1$ reaction depending on

An organic halide is shaken with aqueous $NaOH$,followed by the addition of $dil. HNO_3$ and silver nitrate solution,which gives a white precipitate. The substance can be: