濃硫酸+糖

Sugar(s) + liq conc sulphuric acid-------> carbon(s)+ liq dilute sulphuric acid
Surcose C11H22O11(s) + H2SO4--------> 11C + H2SO4.11H2O(diluted)
This is one action to be used drain opener to clear the block of sewage . Organic matters such as carbohydrates(sugar , rice , vegatables...etc) , protein(pork , beef , chicken ,...etc) , lipid (lard ,oil ,...etc) , wood , paper & etc can be dehydrated by Concentrated Sulphuric acid (above 90%) from solid form to black powder carbon . The conc sulphuric acid extracts molecular hydrogen & oxygen to form water to dilute itself .

C12H22O11(s)--->12C(s)+11H2O(l/g)
條式應該係咁樣 因為H2SO4既角色係dehydrating agent 佢唔會參與糖變碳的過程,所以唔會寫埋H2SO4(l) 係條equation 到 仲有你想問的個隻糖應該係C12H22O11雙糖 因為C11H22O11係1隻叫Paraformaldehyde substance(用來整thermoplastic)