Onion cells contain some chemical compound called sulphur. Two chemical reactions take place when cutting an onion. When cutting an onion, the cells break and release a strong odor and volatile the sulphur gas which contain in onions. Then it will react with eyes forming sulphuric acid, which makes our eyes irritation. The nerves of our eyes are very sensitive. Our brain will react by telling the tears to produce water to prevent from the irritation. This will make us to cry so that our eyes will be protected from the sulphur acid.
There are some ways to prevent from crying when chopping onions...
- The onions should be chopping under cold water so that the chemical compound will be release and react with the water.
- The onion also can be kept in refrigerator to freeze so it can slow down the chemical reaction.
Sulphur is from group 16 in a periodic table. It has a 16 atomic number and a member of the oxygen family. Sulphur is in pale yellow color and non-metal element. It is also used extensively in making phosphates fertilizers. Sulphur very important for our life. It is a minor component of fats, body fluids, and skeleton minerals. It also used in producing batteries and detergent.
Malarvili Purushothaman
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