Question

While cutting onions our tears start flowing.
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Answer 1

Answer:

Onions produce the chemical irritant known as syn-propanethial-S-oxide. It stimulates the eyes' lachrymal glands so they release tears. ... The synthase enzyme converts the amino acids sulfoxides of the onion into sulfenic acid. The unstable sulfenic acid rearranges itself into syn-ropanethial-S-oxide.

Answer 2

Answer:

• Onion contains the amino acid sulfoxides as well as, it also contains an enzyme called lachrymatory factor synthase. When we cut an onion, then lachrymatory factor synthase is released into the air. It converts the amino acid sulfoxide of the onion into sulfenic acid, it is a very unstable compound. The unstable sulfenic acid rearranges itself into syn- propanethial-S-oxide. Syn-propanethial-S-oxide gets into the air and comes in contact with our eyes. The lachrymal gland becomes irritated and produces the tears.