Petrol and kerosene are not single substances, but rather mixtures of hydrocarbons. This means they don't have a specific boiling point like pure substances do. Instead, they have boiling point ranges:

* Petrol: The boiling point range for petrol (gasoline) is roughly 35°C to 200°C (95°F to 392°F).

* Kerosene: The boiling point range for kerosene is roughly 150°C to 300°C (302°F to 572°F).

Keep in mind that these are approximate ranges and can vary depending on the specific blend and refining process.