A) A substance that stops a chemical reaction from occurring. B) A substance that increases the rate of a chemical reaction without being consumed in the process. C) A substance that decreases the rate of a chemical reaction. D) A substance that reacts with another substance to form a new compound.
A) A neurotransmitter B) A structural protein C) A lipid molecule D) A biological catalyst
A) To replace the catalyst in a reaction B) To enhance the catalytic activity of a catalyst C) To inhibit the catalytic activity of a catalyst D) To change the chemical nature of the catalyst
A) Increasing the production cost B) Causing more waste to be generated C) Making the reactions more hazardous D) Lowering the activation energy and increasing reaction rates
A) To produce more greenhouse gases B) To increase engine power C) To increase the fuel efficiency of the engine D) To reduce harmful emissions by converting them into less harmful substances
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 ease of recycling the catalyst C) The cost of the catalyst used in a reaction D) The ability of a catalyst to promote one specific reaction pathway over others
A) Magnesium oxide B) Enzymes C) Silver D) Carbon nanotubes
A) Solid catalysts are never used in industrial processes 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 have a higher reaction selectivity
A) Color of the catalyst B) Vessel size in which the reaction takes place C) Temperature of the surrounding environment D) Surface area of the catalyst |