What will happen if you take some coriander leaves and keep it in a polythene bag for few hours?

If you take some coriander leaves and keep them in a polythene bag for a few hours, the leaves will likely wilt and become limp. This is because the polythene bag creates a moist environment, which can cause the leaves to lose water and become soft. Additionally, the lack of air circulation in the bag can lead to the build-up of ethylene gas, which can further contribute to the wilting process.

To keep coriander leaves fresh for longer, it's best to store them in a cool, dry place with good air circulation. You can wrap the leaves in a damp paper towel and place them in the refrigerator, or you can store them in a perforated plastic bag in the crisper drawer. This will help to prevent them from wilting and keep them fresh for several days.