Question

How would you show that setting of a curd is a chemical change?

Answer 1

Chemical change:-

• During a change if the chemical compositions of a substances changes, then that change is called a chemical change.
• This result in the breaking or formation of bonds at an atomic level.
• An example of such a type of change is the setting of curd.

Setting of curd is a chemical change:-

• Due to the occurrence of a new substance(Lactic acid) which is formed, the setting of curd is a chemical change.
• The resulted cured now has a distinct flavour from the original substance(milk).
• Also the milk cannot be obtained again once it is changed to curd.
• Hence it is also an irreversible change.