List of top Chemistry Questions on Methods of Preparation of Haloalkanes asked in BITSAT

The boiling point of alkyl halides are higher than those of corresponding alkanes because of
An organic compound A (C\(_4\)H\(_9\)Cl) on reaction with Na/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative. Then A is:
In an \( \text{S}_\text{N}2 \) substitution reaction of the type \( \text{R} - \text{Br} + \text{Cl}^- \xrightarrow{\text{DMF}} \text{R} - \text{Cl} + \text{Br}^- \), which one of the following has the highest relative rate?
A is an optically inactive alkyl chloride which on reaction with aqueous KOH gives B. On heating with Cu at 300C gives alkene C. What are A and C?