Regents Chemistry Exam June 2024 Question 27
27 What is the general formula for the homologous series that includes ethyne?
(1) CnHn (3) CnH2n+2
(2) CnH2n (4) CnH2n-2
Solution:
Table Q on the Regents Reference table lists all the formulas for hydrocarbons including alkanes (ending in "ana"), alkenes (ending in "ene") and alkynes (ending in "yne"). You can find ethyne under examples for alkynes and the formula is CnH2n-2, choice 4.
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