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