HS Sample Set 11, Round 15 from NSB
Which of the following ligands induces the largest electronic d orbital splitting in a transition metal complex? W) Chloro X) Aqua Y) Cyano Z) Ethylenediamine
W: W) Chloro
X: X) Aqua
Y: Y) Cyano
Z: Z) Ethylenediamine
Answer: Y) Y) Cyano
Consider an organic compound with no rings in its structure, and with the chemical formula C₁₂H₁₆O₂. What is the number of double bonds in its structure?
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If the radial dependence of the electric field of a monopole is 1/r², what is the long range radial dependence of an electric dipole?
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A weight is sinking in a fluid. The drag force on the weight is equal to a constant times its velocity squared times the density of the fluid. In SI base units, give the dimensions of the constant.
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Which of the following cell types is associated with haversian canals? W) Osteocytes X) Chondrocytes Y) Fibroblasts Z) Leukocytes
W: W) Osteocytes
X: X) Chondrocytes
Y: Y) Fibroblasts
Z: Z) Leukocytes
Answer: W) W) Osteocytes
Identify all of the following four plants that have evolved mechanisms to reduce bio-energetically wasteful photorespiration: 1) Cactus; 2) Oak trees; 3) Potatoes; 4) Rice.
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The greenhouse effect on Venus is primarily attributed to what gas?
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To the nearest power of ten, how many times as intense is the light we receive from a star with apparent magnitude –1 as that of another star with apparent magnitude 4?
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If 6 dice are rolled and the numbers on the top faces are added together, how many different sums are possible?
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What is the largest prime factor of the quantity 4²⁰¹⁴ + 4²⁰¹⁵ + 4²⁰¹⁶ + 4²⁰¹⁷?
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The Advanced Light Source can be used to identify elements in batteries and fuel cells. Which of the following tools is most likely used for these purposes at the ALS? W) Fluorescence microscopy X) X-ray absorption spectroscopy Y) NMR spectroscopy Z) Confocal microscopy
W: W) Fluorescence microscopy
X: X) X-ray absorption spectroscopy
Y: Y) NMR spectroscopy
Z: Z) Confocal microscopy
Answer: X) X) X-ray absorption spectroscopy
Researchers at the Joint Genome Institute have been using new types of fungi to produce biofuels from plant material. Where are these fungi naturally found? W) Forest soils X) Coral reefs Y) Animal guts Z) Swamps
W: W) Forest soils
X: X) Coral reefs
Y: Y) Animal guts
Z: Z) Swamps
Answer: Y) Y) Animal guts
Compton scattering is the scattering of X-ray photons from what particle?
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Which of the following is closest to the half-life of a free neutron? W) 1 second X) 10 minutes Y) 100 hours Z) 1000 years
W: W) 1 second
X: X) 10 minutes
Y: Y) 100 hours
Z: Z) 1000 years
Answer: X) X) 10 minutes
In fluidized bed combustors used for clean coal, what is added to the coal to keep pollutants in check?
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The great majority of the transistors in integrated circuits are of the CMOS type. What do the letters of the acronym represent?
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Consider the hypothetical reaction 2A (aq) + 2B (g) → 3C (aq) + D (g), ΔH = –22 kJ. Which of the following will drive the reaction toward the products? W) Increasing the temperature X) Increasing the volume of the reaction vessel at constant temperature Y) Increasing the pressure Z) Increasing the amount of D
W: W) Increasing the temperature
X: X) Increasing the volume of the reaction vessel at constant temperature
Y: Y) Increasing the pressure
Z: Z) Increasing the amount of D
Answer: Y) Y) Increasing the pressure
Which of the following solvents would most accelerate an SN2 reaction? W) Hexane X) Dichloromethane Y) DMSO Z) Ethyl acetate
W: W) Hexane
X: X) Dichloromethane
Y: Y) DMSO
Z: Z) Ethyl acetate
Answer: Y) Y) DMSO
In the integers mod 12, what is 5 times 8?
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f(x) is twice differentiable with f′(x) < 0 and f″(x) < 0 for all real x. If f(3) = 12 and f(5) = 8, what is the largest possible integer value for f(7)?
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What is the genus of the harmless gut bacterium that can be transformed by a bacteriophage into a virulent form associated with cholera?
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A disease-linked, spontaneous germ line mutation creates a restriction site for HaeIII. After restriction digestion and agarose gel imaging, which is expected? W) No diagnostic point mutation exists on either chromosome X) Both maternal and paternal chromosomes have the point mutation Y) Either the maternal or the paternal chromosome has the point mutation, but not both Z) The test was inconclusive
W: W) No diagnostic point mutation exists on either chromosome
X: X) Both maternal and paternal chromosomes have the point mutation
Y: Y) Either the maternal or the paternal chromosome has the point mutation, but not both
Z: Z) The test was inconclusive
Answer: Y) Y) Either the maternal or the paternal chromosome has the point mutation, but not both
According to the Stefan-Boltzmann law, a star with surface temperature three times that of the Sun would emit how many times as much energy as the Sun?
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The closed universe solution of general relativity has mass density exceeding what parameter?
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What viral reproductive cycle kills the infected host cell while the virus is dividing?
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What is the number of cells present in a mature male angiosperm gametophyte?
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Brookhaven National Lab scientists recently made strides on understanding the nature of Cooper pairs. To which discipline is this most relevant? W) Particle physics X) Superconductor physics Y) Nuclear physics Z) Computational chemistry
W: W) Particle physics
X: X) Superconductor physics
Y: Y) Nuclear physics
Z: Z) Computational chemistry
Answer: X) X) Superconductor physics
Scientists at Argonne are using x-rays to probe porosity in 3D-printed titanium alloys. Which best explains why porosity is undesirable? W) Porosity decreases resistance to fatigue X) Porosity decreases flexibility Y) A large range of pore sizes reduces printing resolution Z) Porosity limits the size of the structures that can be printed
W: W) Porosity decreases resistance to fatigue
X: X) Porosity decreases flexibility
Y: Y) A large range of pore sizes reduces printing resolution
Z: Z) Porosity limits the size of the structures that can be printed
Answer: W) W) Porosity decreases resistance to fatigue
Identify all of the following three statements that are true of the inner planets: 1) Mercury has an atmosphere of primarily methane; 2) All of the inner planets revolve in the same direction around the sun; 3) All of the inner planets rotate in the same direction around their axes.
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Which of the following is most directly responsible for ocean water downwelling in the mid-ocean gyres? W) Ekman transport X) High surface water density Y) High organic carbon content Z) Sea floor spreading
W: W) Ekman transport
X: X) High surface water density
Y: Y) High organic carbon content
Z: Z) Sea floor spreading
Answer: W) W) Ekman transport
By what phenomenon can materials emit electrons in response to incident light?
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CPT symmetry is fundamental in physics. What do the C, P, and T stand for?
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Rank the following three elements in order of increasing electron affinities: 1) Carbon; 2) Nitrogen; 3) Oxygen.
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What effect, exploited in the liquefaction of air, causes a gas’s temperature to decrease in an adiabatic isenthalpic expansion?
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What is the volume of a circular cylinder formed by rotating a 5 by 6 rectangular region about one of its shorter sides?
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The sums of three whole numbers taken in pairs are 11, 13, and 14. What is the product of these three numbers?
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What type of extrusive igneous rock, intermediate between basalt and dacite and with approximately 60% silica, is this?
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What ocean water mass has the oldest carbon-14 age, meaning it has spent the most time isolated from the atmosphere? W) North Atlantic Deep Water X) Antarctic Bottom Water Y) North Pacific Deep Water Z) Circumpolar Deep Water
W: W) North Atlantic Deep Water
X: X) Antarctic Bottom Water
Y: Y) North Pacific Deep Water
Z: Z) Circumpolar Deep Water
Answer: Y) Y) North Pacific Deep Water
If exactly 10 diagonals of a particular convex polygon contain the same vertex, how many total sides does the polygon have?
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In a particular year, if April 15 is on a Wednesday, on what day of the week is December 25?
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The Ti plasmid can be used to stably transfect some plants. What is the genus of the bacterium that is a vector for this plasmid?
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Identify all of the following four cell types involved in plant transport physiology that are non-living yet functional when mature: 1) Parenchyma; 2) Sclereid; 3) Sieve tube; 4) Tracheid.
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Identify all of the following three particles that, according to the standard model, can be affected by gravity: 1) Electron; 2) Pion; 3) Gluon.
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In fluorescence microscopy, energy from absorbed photons is re-emitted as new photons. If the new photons have only two-thirds of the momentum of the absorbed photons, what is the ratio of the wavelength of the new photons to that of the absorbed photons?
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What is the IUPAC name for the cyclic saturated hydrocarbon containing four carbon atoms?
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Identify all of the following three functional groups that commonly participate in addition reactions: 1) Aldehyde; 2) Alkene; 3) Alkyl halide.
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