Question

Why the tears come in our eyes when we cut an onion?​

Answer 1

Answer:

because onion have a type of toxic chemical which by cutting it our tears come in our eyes

Answer 2

Answer

onion have cells which releases a compound called sulfenic acid. This acid get mix with the enzymes of onion and releases another gas called propanethiol S-oxide. This gas get mixed with the water present in your eyes and produce sulphuric acid. This sulphuric acid irritates your eyes and makes you cry!!