D none of the above 4 Which hydrocarbon compound has a double bond in its molecule? A 2-octyne B. cthene Cethyne D. methane 5. Which group of hydrocarbons has triple bonds? A alkaloid B. alkane C. alkene D. ayne 6. How many carbon atoms are there in hexane? A 5 B.6 C 7 D8 7. Which has the shortest chain of carbon atoms? A butang B. butene C ethane D. methane What is the IUPAC name of CH-CHCH.CH.CH.CH.CH.CH.? A 1-octene B. 2-heptyne Chexane D propane 15