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 double - bonds (O=C=O), H₂O has single bonds (H - O - H), CH₄ has single bonds (C - H), C₂H₄ has one double - bond (C=C) and single C - H bonds, and PH₃ has single bonds (P - H).

Answer:

D. C₂H₄