A) A substance that stops a chemical reaction from occurring. B) A substance that decreases the rate of a chemical reaction. C) A substance that reacts with another substance to form a new compound. D) A substance that increases the rate of a chemical reaction without being consumed in the process.
A) A biological catalyst B) A lipid molecule C) A structural protein D) A neurotransmitter
A) To inhibit the catalytic activity of a catalyst B) To change the chemical nature of the catalyst C) To replace the catalyst in a reaction D) To enhance the catalytic activity of a catalyst
A) Making the reactions more hazardous B) Lowering the activation energy and increasing reaction rates C) Causing more waste to be generated D) Increasing the production cost
A) To produce more greenhouse gases B) To reduce harmful emissions by converting them into less harmful substances C) To increase engine power D) To increase the fuel efficiency of the engine
A) When a catalyst is deactivated by the reaction mixture B) When a product of a reaction acts as a catalyst for that reaction C) When a byproduct of a reaction poisons the catalyst D) When a reactant of a reaction accelerates the reaction
A) The ease of recycling the catalyst B) The speed at which a catalyst degrades C) The cost of the catalyst used in a reaction D) The ability of a catalyst to promote one specific reaction pathway over others
A) Magnesium oxide B) Silver C) Carbon nanotubes D) Enzymes
A) Solid catalysts are always less efficient than homogeneous catalysts B) Solid catalysts are never used in industrial processes C) Solid catalysts are typically easier to separate from the reaction mixture D) Solid catalysts have a higher reaction selectivity
A) Color of the catalyst B) Temperature of the surrounding environment C) Vessel size in which the reaction takes place D) Surface area of the catalyst |