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