Which of the following is the straight-chain isomer of C4H10?

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Multiple Choice

Which of the following is the straight-chain isomer of C4H10?

Explanation:
Alkanes with the same molecular formula can have different connectivities, giving straight-chain (unbranched) and branched structural isomers. For C4H10, the four carbon atoms can be arranged in one continuous chain or with a branch. The straight-chain arrangement places all four carbons in a row with single bonds, which is butane. The branched form is 2-methylpropane (methyl propane). The other options don’t fit because propane has only three carbons, ethane has two, and methyl propane is the branched isomer.

Alkanes with the same molecular formula can have different connectivities, giving straight-chain (unbranched) and branched structural isomers. For C4H10, the four carbon atoms can be arranged in one continuous chain or with a branch. The straight-chain arrangement places all four carbons in a row with single bonds, which is butane. The branched form is 2-methylpropane (methyl propane). The other options don’t fit because propane has only three carbons, ethane has two, and methyl propane is the branched isomer.

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