Question

when will a saturated hydrocarbon on burning gives a Sooty flame?​

Answer 1

Answer:

Saturated hydrocarbons produce clean flame while unsaturated carbon compounds produce yellow flame with black smoke. The burning of carbon compounds results in a sooty deposit on the surface or a sooty flame if there is an incomplete combustion of saturated hydrocarbons due to limited supply of air.

Answer 2

Saturated hydrocarbons will generally give a clean flame while unsaturated carbon compounds will give a yellow flame with lots of black smoke. However, limiting the supply of air results in incomplete combustion of even saturated hydrocarbons giving a sooty flame.