A neutral liquid A on treatment with Lucas reagent produces a compound B, which upon treatment with alcoholic KOH yields a compound C. The compound C decolourises bromine water and upon ozonolysis forms only methanal. Deduce the structures of A, B and C and explain the reactions.

Explanation

`underset("decolourises" Br_(2) "water" )(CH_(3)CH_(2)OH underset("reagent")overset("Lucas")to CH_(3)CH_(2)Cl overset("Alc. KOH")to underset((C))(CH_(2)=CH_(2))-CH_(2)=CH_(2) overset(O_(3))to HCHO)`
According to the given reactions, C is `CH_(2)=CH_(2)` and B is `CH_(3)CH_(2)Cl` and A is `CH_(3)CH_(2)OH`