Question

3.

Four samples of milk were treated as
show below in diagrams 1, 2, 3 and
4.
5.
3
Left open
1
Sealed
without
boiling
2
Boiled,
then left
open
without
Boiled,
then sealed
boiling
In which flask will the milk take
longest to turn sour?​

Answer 1

2

Step-by-step explanation: