Question

Chemical change are characterised by:
a. Formation of new substance
b. Release of energy
c. Absorption of energy
d. Reversible​

Answer 1

Chemical change are characteristic by -

Ans:- Formation of new substance

Answer 2

A chemical change (chemical reaction) is a change of materials into other, new materials with different properties, and one or new substances are formed. Burning of wood is a chemical change as new substances which cannot be changed back (e.g. carbon dioxide) are formed.

So the correct answer is option A