Question

4. While cutting onions our tears start flowing
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Answer 1

Explanation:

Why does eyes water when cutting onions?

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.

Other answers of this question

- Why tears naturally come out when slicing onions?

When an onion is sliced or diced, the onion's cells release these compounds into the air. When this occurs, "enzyme" works to alter the amino acids into lachrymator compounds. This form of sulfuric acid irritates the nerves around the eyes making them tear.

Answer 2

Explanation:

Yess when cutting onions our tears starts flowing because onion stimulates the lachrymal glands of the eyes by producing the chemical irritants / gas known as syn- propanethial -s-oxide . This chemical irritant stimulates the lachrymal glands and thus our tears starts to flow

I hope its help you.... yar