Class 7:Why do Cut Fruits Turn Brown? The Science Behind Browning of Fruits Explained

Have you ever cut an apple or a banana and left it on the plate only to come back and find it had turned an unappetising brown? It feels like the fruit went bad in minutes! But what's actually happening here isn't magic or spoilage, it's pure chemistry. 

The browning of fruits and vegetables is a fascinating chemical change that happens right in your kitchen, every single day.

In this article, we'll explore exactly why this happens, which fruits and vegetables are affected, how it compares to rusting, and most importantly, how you can stop it from happening. 

Table of Contents 

• Browning of Fruits
• Prevention of Browning of Fruits

Browning of Fruits

What happens when slices of potatoes are left exposed to air? The slices will turn brown after some time.

Browning of potatoes is a chemical change because it is a permanent change. We cannot get fresh potatoes back.

The chemical reaction involved:

It happens due to the reaction of a substance present in the potatoes with oxygen in the air. This reaction results in the formation of a brown substance. It is quite similar to rusting. Other fruits and vegetables, such as bananas, brinjal, pears, peach, and apples, also become brown when their cut slices are exposed to air.

Prevention of Browning of Fruits 

Browning of sliced fruits and vegetables can be inhibited by preventing their direct contact with oxygen (air). It can be done by:

• Rubbing a lemon on the cut surfaces of fruits and vegetables.
• Place the cut fruits and vegetables in water. (However, this should be avoided; vitamins are lost)

The browning of fruits and vegetables is a perfect everyday example of a chemical change happening right before our eyes. A simple slice of apple or potato, left in the open air, quietly undergoes a chemical reaction with oxygen, forming a new substance and changing permanently, much like rust forms on iron. Understanding this process not only helps us appreciate the science hidden in our kitchens but also empowers us to make smarter choices, like reaching for a lemon to keep our fruit salad fresh and vibrant. Science truly is everywhere, even on your plate!