The correct answer is C. With UV-rays and O2, it forms poisonous gas phosgene.
Chloroform is a colorless, sweet-smelling liquid that is used as an anesthetic and a solvent. It is also a carcinogen, meaning that it can cause cancer. When chloroform is exposed to ultraviolet light, it reacts with oxygen to form phosgene, a poisonous gas. Phosgene is a colorless, odorless gas that can cause death if inhaled. It is also a choking agent, meaning that it can cause respiratory problems.
To prevent the formation of phosgene, chloroform is stored in brown-tinted glass containers. Brown glass blocks ultraviolet light, which prevents the reaction between chloroform and oxygen. This helps to keep chloroform safe to use.
The other options are incorrect. Option A is incorrect because the brilliance color of chloroform does not hurt eyes. Option B is incorrect because the deep red color of chloroform is not piercing. Option D is incorrect because chloroform does not form a poisonous cyanide with IR-rays.