The radical chlorination of propane yields a mixture of both 1-chloropropane and 2-chloropropane, as dictated by fundamental organic chemistry regarding the relative stability of primary and secondary free radical intermediates.
The claim states a textbook chemical fact about the radical chlorination of propane yielding a mixture of 1-chloropropane and 2-chloropropane. This is a foundational and trivially true statement in organic chemistry concerning regioselectivity and free radical stability, classified as common knowledge requiring no citation.