Which sequence lists alkanes in increasing number of carbon atoms?

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Multiple Choice

Which sequence lists alkanes in increasing number of carbon atoms?

Explanation:
The concept here is ordering alkanes by how many carbon atoms they have. Alkanes form a homologous series where each step adds one carbon, so the sequence goes from 1 carbon to 2, to 3, to 4, and so on. Methane has 1 carbon, ethane has 2, propane has 3, and butane has 4. Therefore the increasing order by carbon count is methane, then ethane, then propane, then butane. Any sequence that starts with a larger alkane or swaps the order breaks the pattern of increasing carbon atoms.

The concept here is ordering alkanes by how many carbon atoms they have. Alkanes form a homologous series where each step adds one carbon, so the sequence goes from 1 carbon to 2, to 3, to 4, and so on. Methane has 1 carbon, ethane has 2, propane has 3, and butane has 4. Therefore the increasing order by carbon count is methane, then ethane, then propane, then butane. Any sequence that starts with a larger alkane or swaps the order breaks the pattern of increasing carbon atoms.

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