Question
Download Solution PDFWhen milk is converted into curd, which type of change is it?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Chemical Change.
Key Points
- Chemical change:-
- This type of change alters the composition of the substance and results in the formation of a new substance. Examples include combustion, rusting, and digestion. When milk is converted into curd, it undergoes a chemical change.
- This change is irreversible, meaning it cannot be undone.
- The process of converting milk into curd is called fermentation, which is a chemical reaction that occurs due to the presence of bacteria.
- During fermentation, the lactose in the milk is converted into lactic acid, which causes the milk to thicken and form curd.
Additional Information
- Reversible change:
- This type of change can be undone, meaning the original substance can be restored. Examples include melting and freezing of ice.
- Physical change:
- This type of change does not alter the composition of the substance. Examples include changes in state (solid, liquid, gas) and changes in shape or size.
- Isothermal change:
- This type of change occurs at a constant temperature and does not involve any change in energy.
Last updated on May 28, 2025
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