Question

the non metal which forms the black residue when sugar is burnt​

Answer 1

Answer:

coal tar hope it will help you PLSS mark me as brainlist

Answer 2

Explanation:

The sugar is incompletely combusted to give elemental carbon, a black sooty substance.

Explanation:

Complete combustion of sugar gives ONLY carbon dioxide and water gases:

C6H12O6(s)+6O2(g)→6CO2(g)↑⏐+6H2O(l)

This is balanced with respect to mass of charge. If I assume that some of the sugar is incompletely combusted to elemental C, I could write:

C6H12O6(s)+5O2(g)→5CO2(g)+C(s)+6H2O(l)

Note that this is not just an intellectual exercise only, in that it would not be too hard to measure the products evolved under conditions of incomplete combustion. And if SOME carbon monoxide were evolved we could write...

C6H12O6(s)+152O2(g)→4CO2(g)+CO(g)+C(s)+6H2O(l)

Note that when we combust hydrocarbon fuels in the internal combustion engine, some of the hydrocarbon fuels are always incompletely combusted to CO and Cas soot.