A) A substance that decreases the rate of a chemical reaction. B) A substance that increases the rate of a chemical reaction without being consumed in the process. C) A substance that reacts with another substance to form a new compound. D) A substance that stops a chemical reaction from occurring.
A) A biological catalyst B) A structural protein C) A lipid molecule D) A neurotransmitter
A) To change the chemical nature of the catalyst B) To enhance the catalytic activity of a catalyst C) To replace the catalyst in a reaction D) To inhibit the catalytic activity of a catalyst
A) Making the reactions more hazardous B) Increasing the production cost C) Causing more waste to be generated D) Lowering the activation energy and increasing reaction rates
A) To produce more greenhouse gases B) To increase the fuel efficiency of the engine C) To reduce harmful emissions by converting them into less harmful substances D) To increase engine power
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 byproduct of a reaction poisons the catalyst D) When a catalyst is deactivated by the reaction mixture
A) The speed at which a catalyst degrades B) The cost of the catalyst used in a reaction C) The ability of a catalyst to promote one specific reaction pathway over others D) The ease of recycling the catalyst
A) Carbon nanotubes B) Enzymes C) Silver 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) Color of the catalyst C) Vessel size in which the reaction takes place D) Temperature of the surrounding environment |