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