• # question_answer Which of the following has the lowest boiling point? A) ${{H}_{2}}O$                     B) $~C{{H}_{4}}$                  C) ${{C}_{2}}{{H}_{5}}OH$                       D)  HF

$C{{H}_{4}}$is a gas due to Van der Waal?s forces of attractions. Hence, the correct option is (b).