Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octane is chemically known as ___________________?
Correct answer: B. 2-2-4 tri methyl pentane
- A. α-methyl naphthalene
- B. 2-2-4 tri methyl pentane
- C. 1, 3 butadiene
- D. Tetra methyl ethylene
Explanation
Iso-octane is 2,2,4-trimethylpentane, a branched C8 hydrocarbon chosen as the high-octane reference fuel and assigned an octane number of 100. Alpha-methylnaphthalene is associated with cetane-number reference standards.
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