A) A substance that increases the rate of a chemical reaction without being consumed in the process. B) A substance that stops a chemical reaction from occurring. C) A substance that reacts with another substance to form a new compound. D) A substance that decreases the rate of a chemical reaction.
A) A lipid molecule B) A neurotransmitter C) A structural protein D) A biological catalyst
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) Causing more waste to be generated C) Lowering the activation energy and increasing reaction rates D) Increasing the production cost
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
A) To increase the fuel efficiency of the engine B) To increase engine power C) To reduce harmful emissions by converting them into less harmful substances D) To produce more greenhouse gases
A) When a reactant of a reaction accelerates the reaction B) When a byproduct of a reaction poisons the catalyst C) When a catalyst is deactivated by the reaction mixture D) When a product of a reaction acts as a catalyst for that reaction
A) Magnesium oxide B) Enzymes C) Carbon nanotubes D) Silver
A) The ease of recycling the catalyst B) The ability of a catalyst to promote one specific reaction pathway over others C) The cost of the catalyst used in a reaction D) The speed at which a catalyst degrades |