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Name the conventional solvent that was used for dry cleaning purposes which later confirmed to be a suspected carcinogen.

(a) Supercritical CO2

(b) Phenanthrene

(c) Tetrachloroethene

(d) Benzene aldehyde

I had been asked this question in an interview for internship.

This intriguing question comes from Green Chemistry topic in division Environmental Chemistry of Chemistry – Class 11

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Right option is (c) Tetrachloroethene

Explanation: Tetrachloroethene was used as a solvent for dry cleaning purposes. It is a suspected carcinogen and groundwater contaminant. It is replaced by greener solvent like supercritical CO2.

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