Which among the following is $NOT$ a feature of $S_N1$ mechanisms?

Which of the following chloro compounds has a dipole moment?

The reaction of a mixture of two alkyl halides with sodium in ether gives $2-$methylpropane. The alkyl halides are:

Which among the following has the lowest boiling point?

Nitrochloroform (Chloropicrin) is prepared by the action of chloroform and:

Identify the correct order for the given property for the following compounds. Choose the correct answer from the options given below:
$(A)$ Boiling Point: $CH_3CH_2Cl < CH_3CH_2CH_2Cl < CH_3CH_2CH_2CH_2Cl$
$(B)$ Density: $CH_3CH_2Br < CH_3CH_2Cl < CH_3CH_2I$
$(C)$ Boiling Point: $CH_3CH_2Br < (CH_3)_2CHBr < (CH_3)_3CBr$
$(D)$ Density: $CH_3CH(I)Br < CH_3CH_2CH_2Br < CH_3CH(Br)Cl$
$(E)$ Boiling Point: $CH_3CH_2CH_2CH_2Cl > (CH_3)_2CHCH_2Cl > (CH_3)_3CCl$