Question

Grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented under what conditions do these grapes ferment i'd it a chemical or physical change

Answer 1

Answer:

Explanation:

When grapes are attached to the plant, aerobic respiration takes place in the cells as the oxygen reaches there. But when plucked, no oxygen reaches the cell, therefore fermentation starts. It is obvious that fermentation takes place only in the absence of oxygen (anaerobic condition).  

Fermentation is a chemical change in which sugar is converted to alcohol.

Answer 2

Grapes hanging from the plant do not ferment because they are still alive and their immune system  is still working. When they are plucked from the plant, their immune system stops working and hence,  they ferment. Under anaerobic condition microorganisms like yeast ferments grapes and wine is formed.