Question

what will happen if butter milk is added to chilled milk

Answer 1

it will turn to curd when you add butter milk to chilled milk.

Answer 2

The following are the observations we notice when we add buttermilk to chilled milk :

1.The milk will not change to curd because - butter milk contains Lactobacillus bacterium (which converts milk to curd) which cannot multiply or grow in that cool temperature.(if it grows then only milk will change into curd)

2.Some situation its changes into curd but not completely(because of affect of external temperature)

If the same buttermilk add into the lukewarm milk then with in 5-6 hours you observe that milk changed to curd because of favorable temperature for growth