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  4. Traces of molybdenum are used with finely divided iron which acts as a catalyst during Haber’s process for synthesis of ammonia. The molybdenum

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Q. Traces of molybdenum are used with finely divided iron which acts as a catalyst during Haber’s process for synthesis of ammonia. The molybdenum

Surface Chemistry

Solution:

Substances which themselves are not catalysts but when mixed in small quantities with the catalysts increase their efficiency are called promoters or activators.