Question

directions: each set of lettered choices below refers to the numbered statements immediately following it. select the one - lettered choice that best fits each statement. a choice may be used once, more than once, or not at all in each set. the following questions refer to the below molecules: (a) co2 (b) h2o (c) ch4 (d) c2h4 (e) ph3 10. mark for review the molecule with only one double bond

Explanation:

Analyze the molecular structures of each option. CO₂ has two C=O double - bonds. H₂O has single O - H bonds. CH₄ has single C - H bonds. C₂H₄ has one C=C double - bond and PH₃ has single P - H bonds.

Answer:

D. C₂H₄