Question

Souring of milk is a (an) ___________ (desirable/undesirable) change.

Answer 1

Undesirable changes

• Undesirable changes are the changes that are not beneficial to nature, humans, or animals.
• For example, Rusting, and souring of milk.

Souring of milk

• Souring of milk is an undesirable change, in which milk gets spoiled due to the growth of micro-organisms.
• Pasteurization and freezing are required to delay the souring of milk and to avoid spoiling the milk.

Hence, souring of milk is an undesirable change.