Question

Define chemical equation which observation helps us to determine whether a chemical reaction has taken place

Answer 1

Hi,

A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.

The observations are

1 change in colour of products

2 Evolution of smell or odour

3 evolution of heat while the reaction is happening

4 Precipitation of products after the reaction is held

5 evolution of gas

Hope it was helpful !

Answer 2

Answer:

the method of representing chemical reaction with the help of symbols and formula are called chemical equation.

by the change of colour,change of state,change in temperature,formation of precipitate, evolution of gas