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 biological catalyst B) A neurotransmitter C) A structural protein D) A lipid molecule
A) To enhance the catalytic activity of a catalyst B) To replace the catalyst in a reaction C) To inhibit the catalytic activity of a catalyst D) To change the chemical nature of the catalyst
A) Making the reactions more hazardous B) Increasing the production cost C) Lowering the activation energy and increasing reaction rates D) Causing more waste to be generated
A) Solid catalysts are never used in industrial processes B) Solid catalysts have a higher reaction selectivity C) Solid catalysts are always less efficient than homogeneous catalysts D) Solid catalysts are typically easier to separate from the reaction mixture
A) Temperature of the surrounding environment B) Surface area of the catalyst C) Color of the catalyst D) Vessel size in which the reaction takes place
A) To produce more greenhouse gases B) To increase engine power C) To reduce harmful emissions by converting them into less harmful substances D) To increase the fuel efficiency of the engine
A) When a byproduct of a reaction poisons the catalyst 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 reactant of a reaction accelerates the reaction
A) Enzymes B) Carbon nanotubes C) Magnesium oxide D) Silver
A) The speed at which a catalyst degrades B) The ease of recycling the catalyst C) The ability of a catalyst to promote one specific reaction pathway over others D) The cost of the catalyst used in a reaction |