Question

Sugar cannot be separated from sugar solution by evaporation to dryness because sugar will:

• A. catch fire and burn.
• B. sublime on heating
• C. form a lump on heating
• D. char and decompose on heating

Answer 1

The correct option is D char and decompose on heating

Sugar cannot be separated from sugar solution by evaporation to dryness because sugar will char and decompose on heating. When sugar (sucrose) is heated, it undergoes dehydration. The crystalline structure breaks down and the molecules decompose into glucose and fructose. Water is lost. It then polymerize to form caramel, a red-orange colored solid.