A) A substance that decreases the rate of a chemical reaction. B) A substance that stops a chemical reaction from occurring. C) A substance that reacts with another substance to form a new compound. D) A substance that increases the rate of a chemical reaction without being consumed in the process.
A) A structural protein B) A biological catalyst C) A neurotransmitter D) A lipid molecule
A) To enhance the catalytic activity of a catalyst B) To replace the catalyst in a reaction C) To inhibit the catalytic activity of a catalyst D) To change the chemical nature of the catalyst
A) Making the reactions more hazardous B) Lowering the activation energy and increasing reaction rates C) Increasing the production cost D) Causing more waste to be generated
A) When a catalyst is deactivated by the reaction mixture 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 reactant of a reaction accelerates the reaction
A) Silver B) Enzymes C) Magnesium oxide D) Carbon nanotubes
A) To reduce harmful emissions by converting them into less harmful substances B) To produce more greenhouse gases C) To increase the fuel efficiency of the engine 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 ease of recycling the catalyst C) The speed at which a catalyst degrades 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 have a higher reaction selectivity C) Solid catalysts are never used in industrial processes D) Solid catalysts are typically easier to separate from the reaction mixture
A) Latin, meaning 'to speed up'. B) French, meaning 'to change'. C) German, meaning 'to assist'. D) Greek, meaning 'loosen' or 'untie'.
A) enzyme unit B) turnover number (TON) C) katal D) mole per second
A) turnover number (TON) B) katal C) turn over frequency D) enzyme unit
A) sulfur trioxide (SO3) B) nitric oxide (NO) C) oxygen (O2) D) sulfur dioxide (SO2)
A) NO + SO3 → NO2 + SO2 B) NO2 + SO2 → NO + SO3 C) 2 SO2 + O2 → 2 SO3 D) 2 NO + O2 → 2 NO2
A) It changes the thermodynamic barrier B) It increases the difference in energy between starting materials and products C) It stabilizes the transition state more than the starting material D) It decreases the available energy from the environment
A) Chlorine gas B) Nitric oxide C) Singlet oxygen D) Hydrogen peroxide
A) Biocatalysts B) Electrocatalysts C) Organometallic catalysts D) Photocatalysts
A) Water B) Carbon dioxide C) Oxygen D) Hydrogen
A) Benzene B) High-fructose corn syrup C) Acetic acid D) Ethanol
A) Synzymes B) Abzymes C) Enzybiotics D) Ribozymes
A) $500 billion B) $1 trillion C) $700 billion D) $900 billion
A) Fischer–Tropsch synthesis B) Sabatier reaction C) Water-gas shift reaction D) Steam reforming
A) Fischer–Tropsch synthesis B) Sabatier reaction C) Water-gas shift reaction D) Carbonylation processes
A) Ammonia B) Methanol C) Acrylic acid D) Terephthalic acid
A) Inorganic catalysts B) Biocatalysts C) Metal catalysts D) Acid–base catalysis
A) 1880s B) 1794 C) 1811 D) 1835
A) Gottlieb Kirchhoff B) Wilhelm Ostwald C) Vladimir Ipatieff D) Jöns Jakob Berzelius
A) Gottlieb Kirchhoff B) Eilhard Mitscherlich C) Elizabeth Fulhame D) Jöns Jakob Berzelius
A) Wilhelm Ostwald B) Humphry Davy C) Elizabeth Fulhame D) Johann Wolfgang Döbereiner
A) Humphry Davy B) Johann Wolfgang Döbereiner C) Gottlieb Kirchhoff D) Vladimir Ipatieff
A) Vladimir Ipatieff B) Wilhelm Ostwald C) Elizabeth Fulhame D) Jöns Jakob Berzelius
A) Noyori asymmetric hydrogenation B) Hydroxyacetone C) Levofloxacin D) (R)-1,2-Propandiol
A) Eilhard Mitscherlich B) Elizabeth Fulhame C) Johann Wolfgang Döbereiner D) Humphry Davy
A) Vladimir Ipatieff B) Wilhelm Ostwald C) Jöns Jakob Berzelius D) Gottlieb Kirchhoff
A) Friedel–Crafts reactions B) Biocatalysis C) Hydrogenation with nickel catalyst D) Enantioselective catalysis |