Chemistry
Class 9
Why does milk turn sour in summer?
Is it a chemical or physical change?
1 answers
50 votes
1 Answers
uniboardhub
4 months ago
Lactic acid bacteria convert lactose into lactic acid. Since a new substance forms, it's a chemical change.
Join the Discussion
Share your knowledge and help others learn by answering this question.
Help students understand complex topics
Build your reputation as an expert
Contribute to the learning community
Study Materials
Access comprehensive notes, guides, and resources to excel in your studies
Explore Materials
Free Resources
PDF Downloads