Assignment:

1. While performing the experiment " Detection of ammonium sulphate in Milk", a pink color result is observed. What can we conclude from this observation?
2. Find out different adulterants added to milk other than the mentioned, and the tests for detecting them.
3. Why benzoic acid  and salicylic acid is added to milk and what is the basis for the test used to detect  the presence of these acids?
4. Which is the commonly occurring sugar in milk? Will the milk containing this sugar gives a positive result  for the test " Detection of sugar  in Milk"?
5. What could be the purpose of adding soap to the milk and what kind of reaction does soap and phenolphthalein indicator undergo?