Chemistry - Surface Chemistry Question with Solution | TestHub
Which one is false in the following statements?
Options:
Answer:
Solution:
Question Explanation : Identify the false statement about catalysts.
Concept : General characteristics of catalysts.
Solution : A catalyst is a substance that alters the rate of a chemical reaction without being consumed; it is highly specific, meaning a catalyst for one reaction may not catalyze another. Even a minute quantity is sufficient to significantly increase the reaction rate by providing an alternative pathway with lower activation energy.
Sub-dividing a solid catalyst increases its surface area, thereby increasing the number of free vacancies or active sites available for adsorption.
Statement 4 is incorrect because Iron ( Fe ), with molybdenum ( Mo ) as a promoter, is the catalyst used in the Haber's process for the manufacture of ammonia , whereas Nickel is typically used for the hydrogenation of unsaturated hydrocarbons (vegetable oils).
Final Answer : Option (D)