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