Question

3. List the observations which
that a chemical reaction has taken place in activity 1.2

Answer 1

Answer:

(i) Change in state and colour.

(ii) Change in temperature.

(iii) Evolution of gas.

(i) The state of the matter of the reactants and products.

(ii) The change of colour after the chemical reaction.

(iii) Amount of heat evolved or absorbed in a reaction.