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 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 lipid molecule C) A neurotransmitter D) A structural protein
A) To replace the catalyst in a reaction B) To inhibit the catalytic activity of a catalyst C) To change the chemical nature of the catalyst D) To enhance the catalytic activity of a 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 reactant of a reaction accelerates the reaction 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 byproduct of a reaction poisons the catalyst
A) Carbon nanotubes B) Silver C) Magnesium oxide D) Enzymes
A) To increase engine power B) To reduce harmful emissions by converting them into less harmful substances C) To increase the fuel efficiency of the engine D) To produce more greenhouse gases
A) Surface area of the catalyst B) Vessel size in which the reaction takes place C) Temperature of the surrounding environment D) Color of the catalyst
A) The ease of recycling the catalyst B) The ability of a catalyst to promote one specific reaction pathway over others C) The speed at which a catalyst degrades D) The cost of the catalyst used in a reaction
A) Solid catalysts are typically easier to separate from the reaction mixture B) Solid catalysts have a higher reaction selectivity C) Solid catalysts are never used in industrial processes D) Solid catalysts are always less efficient than homogeneous catalysts
A) German, meaning 'to assist'. B) Latin, meaning 'to speed up'. C) French, meaning 'to change'. D) Greek, meaning 'loosen' or 'untie'.
A) enzyme unit B) mole per second C) katal D) turnover number (TON)
A) katal B) turn over frequency C) enzyme unit D) turnover number (TON)
A) sulfur trioxide (SO3) B) sulfur dioxide (SO2) C) oxygen (O2) D) nitric oxide (NO)
A) Hydrogen B) Oxygen C) Water D) Carbon dioxide
A) Ribozymes B) Synzymes C) Enzybiotics D) Abzymes
A) Vladimir Ipatieff B) Jöns Jakob Berzelius C) Gottlieb Kirchhoff D) Wilhelm Ostwald
A) It stabilizes the transition state more than the starting material B) It increases the difference in energy between starting materials and products C) It decreases the available energy from the environment D) It changes the thermodynamic barrier
A) Ethanol B) Acetic acid C) Benzene D) High-fructose corn syrup
A) Gottlieb Kirchhoff B) Vladimir Ipatieff C) Humphry Davy D) Johann Wolfgang Döbereiner
A) Humphry Davy B) Johann Wolfgang Döbereiner C) Elizabeth Fulhame D) Wilhelm Ostwald
A) Water-gas shift reaction B) Fischer–Tropsch synthesis C) Sabatier reaction D) Steam reforming
A) NO2 + SO2 → NO + SO3 B) 2 NO + O2 → 2 NO2 C) 2 SO2 + O2 → 2 SO3 D) NO + SO3 → NO2 + SO2
A) Biocatalysts B) Acid–base catalysis C) Metal catalysts D) Inorganic catalysts
A) $1 trillion B) $500 billion C) $900 billion D) $700 billion
A) Hydroxyacetone B) Noyori asymmetric hydrogenation C) (R)-1,2-Propandiol D) Levofloxacin
A) Singlet oxygen B) Chlorine gas C) Nitric oxide D) Hydrogen peroxide
A) Johann Wolfgang Döbereiner B) Humphry Davy C) Elizabeth Fulhame D) Eilhard Mitscherlich
A) Friedel–Crafts reactions B) Hydrogenation with nickel catalyst C) Enantioselective catalysis D) Biocatalysis
A) Acrylic acid B) Terephthalic acid C) Methanol D) Ammonia
A) Jöns Jakob Berzelius B) Wilhelm Ostwald C) Elizabeth Fulhame D) Vladimir Ipatieff
A) Wilhelm Ostwald B) Gottlieb Kirchhoff C) Vladimir Ipatieff D) Jöns Jakob Berzelius
A) Photocatalysts B) Biocatalysts C) Organometallic catalysts D) Electrocatalysts
A) Carbonylation processes B) Water-gas shift reaction C) Fischer–Tropsch synthesis D) Sabatier reaction
A) Elizabeth Fulhame B) Jöns Jakob Berzelius C) Gottlieb Kirchhoff D) Eilhard Mitscherlich
A) 1794 B) 1835 C) 1880s D) 1811 |