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(D) Green chemistry is a philosophy of chemical research and engineering that encourages the design of products and processes that minimize the use an

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(D) Green chemistry is a philosophy of chemical research and engineering that encourages the design of products and processes that minimize the use and generation of hazardous substances.$1$. Using soaps made of vegetable oils is an eco-friendly practice as they are biodegradable.$2$. Using $H_2O$ for bleaching is eco-friendly as it avoids the use of harmful chlorine-based agents.$3$. Using liquefied $CO_2$ for dry cleaning is an eco-friendly alternative to hazardous halogenated solvents.$4$. Using plastic cans for storing substances is not considered a green chemistry practice because plastics are generally non-biodegradable and contribute to environmental pollution.Therefore,the practice that does not come under green chemistry is $4$.

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