Question

A spoon of white sugar was heated over a stove for 3-5 minutes. The result was the white sugar turned into chemical change

Answer 1

Answer: Sugar turned into "brown and black"

It is example of "chemical change"

Explanation: I hope it can help

Answer 2

The white sugar caramelizes as a result of chemical change.

Explanation:

• When white sugar is heated over a stove for $3-5$ minutes it melts and break into another two forms of sugar.

                         $Sucrose\;\xrightarrow{On\;heating}\;Glu\cos e\;+\;Fructose$

• Caramelization occurs when white sugar is cooked over heat, which gradually causes change in both appearance and flavour.
• During the process of caramelization, the sugar oxidizes and turns into a golden brown color, which is the source of many new flavours like butterscotch, and nutty flavours.
• Caramelization also occurs in onion, meat by dry heating.
• This process of caramelization is an irreversible chemical change.