Name the phenomenon due to which taste and smell of oily food changes when kept for long time open suggest one method to prevent

Name the phenomenon due to which taste and smell of oily food changes

1.	Name the phenomenon due to which taste and smell of oily food changes when kept for long time open suggest one method to prevent
Answer» nomenon is CALLED rancidityit can be PREVENTED by keeping it in air tight CONTAINER or by ADDING antioxidants