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