Question

What is the chemical name of year gas

Answer 1

HEY DEAR....!

the chemical name of year gas is chlorobenzalmalo nonitrile.

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Answer 2

I think u are asking for tear gas :
2-chlorobenzalmalononitrile (also called o-chlorobenzylidene malononitrile) (chemical formula: C10H5ClN2) is the chemical name of tear gas. It is commonly referred to as CS gas