What would you observe when: An aqueous sugar solution is heated to dryness.
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Initially, sugar will obtained as water will get evaporated. But on dry heating sugar gets charred and it turns black. $\text{C}_{12}\text{H}_{22}\text{O}_{11}\xrightarrow{\ \ \ {\Delta}\ \ \ }12\text{C}+11\text{H}_2\text{O}\uparrow$
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