MEDIUM
7th ICSE
IMPORTANT
Earn 100

What are the conditions for a chemical reaction to take place? 

Important Questions on The Language of Chemistry

HARD
7th ICSE
IMPORTANT
When milk is boiled, bubbles are formed. When milk is set to form curd and left outside for a few days, bubbles are formed again. In which of these cases has a chemical reaction taken place? How can you say?