date:Sep 07, 2012
y to burn. If it does, it will produce a cracking sound. This test is only for added water.
Jaggery
Washing soda
A few drops of solution HCl is added to jaggery. Effervescence indicates the presence of washing soda.
Chalk powder
Jaggery is dissolved in water. If it settles down, it indicates the presence of chalk powder.
Alternately, a few drops of concentrated HCl are added to the jaggery. Effervescence indicates the presence of the adulterant.
Metanil yellow colour
A quarter of a teaspoon