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Why does butane show isomerism?

Answer and explanation

Correct answer: Because a four-carbon chain can be straight or branched

Butane has the molecular formula C₄H₁₀. Its four carbon atoms can form a continuous straight chain in n-butane or a three-carbon chain with a methyl branch in 2-methylpropane (isobutane). Both structures contain four carbon and ten hydrogen atoms, but their connectivity differs, so they are structural isomers. The other options incorrectly describe its composition or bonding.

Related tags

ButaneIsomerismBranched ChainStructural IsomersHydrocarbonsCarbon And Its CompoundsScienceClass 10 Mcq

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