Question

Which of the following processes are chemical changes? Give reasons.
a). Making a Salt Solution.
b). Adding Hydrochloric Acid to Marble stone.
c). Evaporation of water.
d). Adding phenolphthalein indicator to acid solution.
e). Respiration
f). Ripening of a Mango.
g). Breaking of Glass.

Answer 1

a) ,c),f) are chemical changes