Iodoethane reacts with sodium in the presence of dry ether. The product is

The set of compounds in which the reactivity of the halogen atom increases in the order is ..........

The arrangement of the following compounds in the increasing order of their boiling points is:
$i$. bromomethane
$ii$. bromoform
$iii$. chloromethane
$iv$. dibromomethane

Which of the following compounds can give a positive iodoform test when treated with aqueous $KOH$ solution followed by potassium hypoiodite?

The $C-X$ bond is strongest among the following:

Which of the following compounds is most reactive towards $S_{N^1}$ reaction?