7. Which of the following slows down the reaction rate? a) Catalytic promoters b) Homogeneous catalyst c) Catalytic poison d) Heterogeneous catalyst
Answer: c Explanation: A catalytic poison is a chemical that, even if present in tiny levels, disrupts the catalyst’s action. For example, any arsenic impurity present in the reacting gas will disrupt the activity of the vanadium pentoxide catalyst in the synthesis of sulphuric acid by contact method.
