By giving a reason state why chemical change takes place in the following case:
Heating of zinc oxide in a hard glass test tube
By giving a reason state why chemical change takes place in the following case: Heating of ammonium chloride in a test tube.
By giving a reason state why chemical change takes place in the following case: Baking of cake.
By giving a reason state why chemical change takes place in the following case: Digestion of food.
Ripening of fruit.
Bursting of crackers