Question

(a) What is meant by a chemical reaction ? Explain with the help of an example.
(b) Give one example each of a chemical reaction characterised by :
Lakhmir Singh Chemistry Class 10

Answer 1

a)when two or more substance react to form new substance with a chemical change then then a chemical reaction take place.
e.g. 2h2+O2 =2h2O

Answer 2

A chemical reaction takes place when 2 or more substance react to form new substance with a chemical change

eg.2h2+o2=2h2o