Question

Which substances cannot be decompose by chemical change?

Answer 1

Answer:

Elements are those pure substances that cannot be decomposed by ordinary chemical means such as heating, electrolysis, or reaction. Gold, silver, and oxygen are examples of elements. Compounds are pure substances formed by the combination of elements; they can be decomposed by ordinary chemical means.

Answer 2

Pure substances are substances which cannot be decompose by chemical change.

• substances which are pure in nature like metals Gold, silver, etc. can never be destroyed by chemical processes such as heating, electrolysis, etc.

• during electrolysis of gold, we again get the pure gold metal at the end of the process at anode.
• so, by chemical process we can only segregate the compounds of pure substance but cannot destroy it.