Which of the following compound decolourises bromine water also reacts with PCl_(5) to give white fumes of HCl?

Which of the following compound decolourises bromine water also reacts

1.	Which of the following compound decolourises bromine water also reacts with PCl_(5) to give white fumes of HCl?
Answer» `CH_(3)CH_(2)OH` `CH_(3)-CH=CH-CH_(2)OH` `CH_(3)OCH_(2)CH=CH_(2)` both (B) and (C ) Solution :`H_(3)C-CH=CH_(2)-OH underset(("Red"))overset(Br_(2)//C Cl_(4))rarr H_(3)C-underset(("Colourless"))(underset(Br)underset(\|)(CH)-underset(Br)underset(\|)(CH))-CH_(2)-OH` `H_(3)C-CH=CH-CH_(2)OH overset(PCl_(5))rarr HCl+POCl_(3)+H_(3)C-CH=CH-CH_(2)-CL`