Petra means ______ ?
Correct answer: C. Rock
- A. Petrol
- B. Sediment
- C. Rock
- D. Fuel
Explanation
The word petroleum comes from Latin roots: petra means rock and oleum means oil, giving the meaning “rock oil.” Therefore, petra refers to rock. Students may choose petrol because it resembles petroleum, but petrol is a fuel and not the meaning of petra.
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About Alkanes
Alkanes are saturated hydrocarbons containing only carbon-carbon and carbon-hydrogen single bonds, with the general formula CnH2n+2 for open chains. Their structure, isomerism, IUPAC nomenclature, physical properties, combustion, free-radical halogenation and conformations are covered, including the difference between substitution in alkanes and addition in unsaturated hydrocarbons.
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