grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented. under what condition do these grapes ferment? is it physical

it's a chemical change...

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. This is a chemical change because a new substance is formed(wine) and it is irreversible

hope this helps..

plzz mark as the brainliest one..!!

it is chemical change as it can't be reversed

fermentation takes place in the following conditions

1. presence of yeast or other stimulant microbes.

2. closed place or container.