Explain why when suger
is heated it
does not boil but rather break down
into carbon and water?

When simple sugars such as sucrose (or table sugar) are heated, they melt and break down into glucose and fructose, two other forms of sugar. Continuing to heat the sugar at high temperature causes these sugars to lose water and react with each other producing many different types of compounds.

due to weak intermolecular

the answer is true.