Question

Which property of gasoline is a physical property?

Answer 1

Anything you can measure in a laboratory without making the gasoline participate in a chemical reaction, i.e. such that you still have the gasoline when you're done. Think about being in a lab, with a beaker of gasoline. Now measure anything you like about the gasoline. As long as you're still left with all the gasoline when you're done, you've measured a physical property.