If the colour of the food item changes after few days, it might be due to food spoilage.
Sudha took a small amount of an unknown food item in a test tube. Then, she added a few drops of iodine to it. The colour of the unknown food item changes to blue-black.
The change in colour of the food item to blue-black indicates the presence of
In an experiment, Radha took small amounts of an unknown food item in a test tube. Then, she added two drops of copper sulphate solution in the test tube along with a few drops of caustic soda solution. After a few minutes, the colour of the food item changed to violet.
In the given experiment, the change in colour of the food item to violet indicates the presence of
*Write the reasons behind the spoilage of food items