Question

What are the six characteristics of a chemical change?

Answer 1

The following can indicate that a chemical change has taken place, although this evidence is not conclusive:

Change of odor.

Change of color (for example, silver to reddish-brown when iron rusts).

Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat.

Change of composition - paper turning to ash when burned.

Light and/or heat given off.

Formation of gases, often appearing as bubbles in liquids.

Formation of a precipitate (insoluble particles).

The decomposition of organic matter (for example, rotting food).

The change is difficult or impossible to reverse.

Answer 2

characteristics of chemical change are:-
#It is irreversible change .
#the substance undergoes change in colour and odor .
#some reaction releases or absorb energy(exothermic and endothermic)
#products differs when reaction is done as the rearranging of atoms takes place.
#some reaction forms precipitate (substances that settle down at the bottom when reaction takes place).
#sometimes it is very difficult or impossible to change the product in its original state.

hope it helps you a lot.........