Question

question 15 (1 point)
use the following information to answer the next question.
ethylene glycol is an odourless and a colourless liquid produced from ethylene. it has wide application as an antifreeze. its iupac name is ethane - 1,2 - diol.
what is the structure of the compound?
○ a) ho - ch₂ - ch - oh - ch₂ - oh
○ b) ho - c ° c - oh
○ c) ho - ch ° ch - oh
○ d) ho - ch₂ - ch₂ - oh
○ e) ho - ch₂ - ch - oh

Explanation:

• The IUPAC name is ethane - 1,2 - diol. The parent chain is ethane (2 carbon atoms).
• The suffix “-diol” indicates two hydroxyl (-OH) groups.
• For ethane - 1,2 - diol, the two - OH groups are attached to the first and second carbon atoms of the ethane chain.
• Option a has 3 carbon atoms and three - OH groups. Option b has two carbon atoms but no hydrogen atoms attached to the carbon atoms (violates carbon's valency of 4). Option c has a double bond (ethane is saturated, no double bonds). Option e has 2 carbon atoms but only one - OH group attached to the second carbon (violates the “1,2 - diol” part of the name).

Answer:

d. HO - CH₂ - CH₂ - OH