Which is a colourless, odourless gas of the alkane series of hydrocarbons with a chemical formula of C 3 H 8?

Explanation

Propane has formula C₃H₈ and is a colourless, odourless gas in its pure form at ordinary room temperature. Commercial fuel propane is commonly odorised for leak detection. Ethane, butane and pentane have formulas C₂H₆, C₄H₁₀ and C₅H₁₂ respectively.