Tamilnadu BoardEnglish MediumSTD 12ChemistrySurface Chemistry2 Marks
Question
What are promoters? Explain with example.
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Answer
1. In a catalysed reaction, the presence of a certain substance increases the activity of a catalyst. Such substance is called a promoter. 2. For example, in Haber's process of manufacture of ammonia, the activity of the iron catalyst is increased by the presence of molybdenum. Hence molybdenum is called a promoter. $ N _{2( g )}+3 H _{2( g )} \stackrel{ Fe / Mo }{\longrightarrow} 2 NH _{3( g )} \text { } $
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