Sugar burns when heated on a skillet physical or chemical change

Chemical change:

The change in which substance lose the identity is called chemical change. For example the rust on iron; in this change iron is oxidized into iron oxide.  

In general chemical changes have following four changes:

1.  Formation of a gas

2.  formation of a solid,  

3.formation of new substances,  

4.  Heat produced or absorbed.

Physical change:

The change in which substance does not lose the identity is called physical change. For example; the conversion of water into ice. In this water did not lose its identity.  

when sugar burns it changed into CO2 and H2O thus according to the above definition it is an example of chemical change  

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

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