The common molecular framework A. octane .Therefore A. octane is correct .
The major isolated organic product of the following reaction:
Octane + H₂ (g) → ?
This is a catalytic hydrogenation reaction, and the product will be the alkane that corresponds to the alkene reactant. In this case, the alkene reactant is octane, so the alkane product is octane.
Therefore, the answer to the multiple-choice question is A. octane.
Explanation of the other answer choices:
B. cis-4-octene and trans-4-octene: These are stereoisomers of octane, which means that they have the same molecular formula and connectivity but different spatial arrangements of their atoms. Stereoisomers are not typically formed in catalytic hydrogenation reactions.
C. no reaction: Catalytic hydrogenation reactions are generally very efficient, and the reaction shown is likely to proceed to completion.
D. a different product or a mixture of more than one of the choices in equal amounts:
The major isolated organic product of a catalytic hydrogenation reaction is typically the alkane product.