Answer / harsha

A pyrotechnic colorant is a chemical compound which causes a flame to burn with a particular color. These are used to create the colors in pyrotechnic compositions like fireworks and colored fires. The color-producing species are usually created from other chemicals during the reaction.
 Metal salts are commonly used; elemental metals are used rarely (e.g. copper for blue flames).

Why does catalytic converter used in an automobile?

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Please help to get IOCL/HPCL or other chemical engineering paper pls send kathir_skv@yahoo.com Regards, kathirvel

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