The reference compound `iso-octane' which is used in determining the octane number of gasoline has the structure

\[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-CH(C{{H}_{3}})-C{{H}_{2}}-C{{H}_{3}}\]

\[C{{H}_{3}}-CH(C{{H}_{3}})-CH(C{{H}_{3}})-CH(C{{H}_{3}})-C{{H}_{3}}\]

\[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-C{{H}_{2}}-CH(C{{H}_{3}})-C{{H}_{3}}\]

\[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-C{{(C{{H}_{3}})}_{2}}-C{{H}_{3}}\]

The reference compound `iso-octane' which is used in determining the o

1.	The reference compound `iso-octane' which is used in determining the octane number of gasoline has the structure
A.	\[C{{H}_{3}}-CH(C{{H}_{3}})-CH(C{{H}_{3}})-CH(C{{H}_{3}})-C{{H}_{3}}\]
B.	\[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-C{{H}_{2}}-CH(C{{H}_{3}})-C{{H}_{3}}\]
C.	\[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-CH(C{{H}_{3}})-C{{H}_{2}}-C{{H}_{3}}\]
D.	\[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-C{{(C{{H}_{3}})}_{2}}-C{{H}_{3}}\]
Answer» C. \[C{{H}_{3}}-C{{(C{{H}_{3}})}_{2}}-CH(C{{H}_{3}})-C{{H}_{2}}-C{{H}_{3}}\]

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The reference compound `iso-octane' which is used in determining the octane number of gasoline has the structure

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