Question

change of milk to curd is a ________ (desirable/ undesirable) change.
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Answer 1

Answer:

Once changed into curd , we can't change it back to milk. Thus, it's an irreversible change. It is a desirable process as it is a milk product it very important for the supplement of calcium which is required by bones and for many reactions.

Answer 2

Answer:

undedirable

Explanation:

Formation of curd from milk is an irreversible change because the product so obtained can't be changed to it's original form . Once changed into curd , we can't change it back to milk. Thus, it's an irreversible change.