Which of the following decreases the rate of reactions?(a) Catalytic promoters(b) Homogeneous catalyst(c) Catalytic poison(d) Heterogeneous catalystI had been asked this question in quiz.I'm obligated to ask this question of Surface Chemistry in section Surface Chemistry of Chemistry – Class 12

Which of the following decreases the rate of reactions?(a) Catalytic p

1.	Which of the following decreases the rate of reactions?(a) Catalytic promoters(b) Homogeneous catalyst(c) Catalytic poison(d) Heterogeneous catalystI had been asked this question in quiz.I'm obligated to ask this question of Surface Chemistry in section Surface Chemistry of Chemistry – Class 12
Answer» Right option is (c) Catalytic poison The best explanation: A catalytic poison is a SUBSTANCE which destroys the activity of the catalyst even if it is PRESENT in trace AMOUNTS. Eg: In the MANUFACTURE of sulphuric acid by contact process, any arsenic impurity present in the reacting GASES will destroy the activity of vanadium pentoxide catalyst.

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