MCQ practice · SSC Chemistry Board questions · Chapter 11: Mineral Resources: Fossils
Which compound is called an olefin?
Think it through first, then pick an option.
- a C₂H₆
- b C₂H₂
- c C₂H₄
- d C₃H₈
Answer and explanation
Correct answer: c C₂H₄
C₂H₄ (ethene) is an alkene; it forms oily products with halogens, hence olefin.
Why the other options are wrong
- a C₂H₆: C₂H₆ (ethane) is an alkane, called a paraffin; the olefin is the alkene C₂H₄.
- b C₂H₂: C₂H₂ (ethyne) is an alkyne; olefin is the name for alkenes such as C₂H₄.
- d C₃H₈: C₃H₈ (propane) is a paraffin; the olefin is C₂H₄.
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