Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: (1) Terpenes are alkenes that contain five double bonds.
(2) A vinyl group is formed when a hydrogen atom is removed from propylene.
(3) Commonly used catalysts for the hydrogenation of an alkene are the metals nickel and platinum.

Question

Quizplus · Accepted Answer

- Statement 1 is FALSE. Terpenes are a large and diverse class of organic compounds, produced by a variety of plants, particularly conifers. They are not defined by containing five double bonds but rather are built from isoprene units, each of which contains one double bond.- Statement 2 is FALSE. A vinyl group is formed when a hydrogen atom is removed from ethylene (not propylene), resulting in the formula –CH=CH2.- Statement 3 is TRUE. Nickel and platinum are indeed commonly used catalysts for the hydrogenation of alkenes, facilitating the addition of hydrogen to the double bonds.

Characterize EACH of the Three Given Statements as Being TRUE