Archives: Quiz

1) Which of the following ions will act as a weak base in water? A) HS– B) F– C) NO2 – D) ClO– E) All of the above will act as a weak base in water. 2) Which combination will […]

1) Oxidation is the ________ and reduction is the ________. A) gain of oxygen, loss of electrons B) loss of oxygen, gain of electrons C) loss of electrons, gain of electrons D) gain of oxygen, loss of mass E) gain […]

1) Which of the following ions will act as a weak base in water? A) OH– B) Cl– C) NO3 – D) ClO– E) None of the above will act as a weak base in water. 2) Tetraboric acid, H2B4O7, […]

1) The name of PCl3 is ________. A) potassium chloride B) phosphorus trichloride C) phosphorous(III) chloride D) monophosphorous trichloride E) trichloro potassium 2) What is the maximum amount in grams of SO3 that can be produced by the reaction of […]

1) To convert from one resonance structure to another, ________. A) only atoms can be moved B) electrons and atoms can both be moved C) only electrons can be moved D) neither electrons nor atoms can be moved E) electrons […]

1) How many hydrogen atoms must bond to silicon to give it an octet of valence electrons? A) 1 B) 2 C) 3 D) 4 E) 5 2) The Keq for the equilibrium below is 7.52 x 10-2 at 480.0 […]

1) The rate law for a reaction is rate = k[A][B] Which one of the following statements is false? A) The reaction is first order overall. B) The reaction is first order in A. C) The reaction is first order […]

1) Which one of the following is an incorrect orbital notation? A) 2s B) 3py C) 3f D) 4dxy E) 4s 2) The electron configuration of a ground-state Ag atom is ________. A) [Ar]4s24d9 B) [Kr]5s14d10 C) [Kr]5s23d9 D) [Ar]4s14d10 […]

1) Coordination sphere isomers ________. A) have the same molecular formula and coordination number B) have the same molecular formula but different coordination numbers C) have different molecular formulas but the same coordination number D) have different molecular formulas and […]

1) Classify the following compounds as weak bases (W) or strong bases (S): ammonia fluoride ion sodium hydro xide A) W W S B) S S S C) S W W D) W S S E) W S W 2) […]

1) Which of the following are strong electrolytes? HCl HC2H3O2 NH3 KCl A) HCl, KCl B) HCl, NH3, KCl C) HCl, HC2H3O2, NH3, KCl D) HCl, HC2H3O2, KCl E) HC2H3O2, KCl 2) [Ar]4s23d104p3 is the electron configuration of a(n) ________ […]

1) What volume (mL) of a concentrated solution of magnesium chloride (9.00 M) must be diluted to 350. mL to make a 2.75 M solution of magnesium chloride? A) 2.75 B) 50.0 C) 45.0 D) 107 E) 350 2) Consider […]

1) Based on the equations below, which metal is the most active? Pb(NO3)2 (aq) + Ni (s) → Ni(NO3)2 (aq) + Pb (s) Pb(NO3)2 (aq) + Ag (s) → No reaction Cu(NO3)2 (aq) + Ni (s) → Ni(NO3)2 (aq) + […]

1) The entropy of the universe is ________. A) constant B) continually decreasing C) continually increasing D) zero E) the same as the energy, E 2) The energy of a photon of light is ________ proportional to its frequency and […]

1) The shape of a liquid’s meniscus is determined by ________. A) the viscosity of the liquid B) the type of material the container is made of C) the relative magnitudes of cohesive forces in the liquid and adhesive forces […]

1) A stock solution of HNO3 is prepared and found to contain 12.7 M of HNO3. If 25.0 mL of the stock solution is diluted to a final volume of 0.500 L, the concentration of the diluted solution is ________ […]

1) Which of the following is soluble in water at 25 °C? A) AgNO3 B) Hg2Cl2 C) PbCl2 D) Ag2S E) AgCl 2) The value of ΔH° for the reaction below is +128.1 kJ: CH3OH (l) → CO (g) + […]

1) The angular momentum quantum number (l) value of 2 indicates the ________ subshell. A) d B) f C) s D) p E) +1/2 2) Precision refers to ________. A) how close a measured number is to other measured numbers […]

1) Carbon-11 decays by ________. A) alpha emission B) beta emission C) positron emission D) photon emission E) neutron capture 2) Standard temperature and pressure (STP), in the context of gases, refers to ________. A) 298.15 K and 1 atm […]

1) The molecular formula of a compound is always ________ the empirical formula. A) more complex than B) different from C) an integral multiple of D) the same as E) simpler than 2) Which formula/name pair is incorrect? A) Mn(NO2)2manganese(II) […]

1) In terms of binding energy per nucleon, what element divides fission and fusion processes? A) H B) He C) C D) Fe E) U 2) Which mineral contains titanium? A) pyrolusite B) chalcopyrite C) galena D) rutile E) sphalerite […]

1) The density of nitric oxide (NO) gas at 0.970 atm and 34.9 °C is ________ g/L. A) 0.0384 B) 0.869 C) 1.15 D) 0.339 E) 10.2 2) The correct name for H2SO3 is ________. A) sulfuric acid B) sulfurous […]

1) The correct name for HClO2 is ________. A) perchloric acid B) chloric acid C) hypochlorous acid D) hypychloric acid E) chlorous acid 2) Which one of the following could be a straight-chain alkane? A) C9H20 B) C3H3 C) C4H6 […]

1) The value of ΔH° for the reaction below is -6535 kJ. ________ kJ of heat are released in the combustion of 16.0 g of C6H6 (l)? 2C6H6 (l) + 15O2 (g) → 12CO2 (g) + 6 H2O (l) A) […]

1) A reaction that is spontaneous as written ________. A) is very rapid B) will proceed without outside intervention C) is also spontaneous in the reverse direction D) has an equilibrium position that lies far to the left E) is […]

1) Element X reacts with chlorine to form a compound with the formula XCl2. The oxide of element X is basic. Element X is ________. A) Rb B) Ca C) Al D) P E) H 2) Which of the following […]

1) Which one of the following is not an intensive property? A) density B) temperature C) melting point D) mass E) boiling point 2) The carbon-carbon σ bond in ethylene, , results from the overlap of ________. A) sp hybrid […]

1) Kp = 0.0198 at 721 K for the reaction 2HI (g) H2 (g) + I2 (g) In a particular experiment, the partial pressures of H2 and I2 at equilibrium are 0.678 and 0.788 atm, respectively. The partial pressure of […]

1) Glass is ________ whereas quartz is ________. A) hard, soft B) crystalline, amorphous C) amorphous, crystalline D) pure SiO2, a mixture of SiO2 and carbonates E) breakable, not breakable 2) How many isomers of C2H2Cl2 are polar? A) none […]

1) Consider the following equilibrium. 2 SO2 (g) + O2 (g) 2 SO3 (g) The equilibrium cannot be established when ________ is/are placed in a 1.0-L container. A) 0.25 mol SO2 (g) and 0.25 mol O2 (g) B) 0.75 mol […]

1) Given the data in the table below, ΔH°rxn for the reaction 3NO2 (g) + H2O (l) → 2HNO3 (aq) + NO (g) is ________ kJ. A) 64 B) 140 C) -140 D) -508 E) -64 2) A 25.0 mL […]

1) The mole fraction of urea (MW = 60.0 g/mol) in a solution prepared by dissolving 16 g of urea in 39 g of H2O is ________. A) 0.58 B) 0.37 C) 0.13 D) 0.11 E) 9.1 2) Which of […]

1) A valid Lewis structure of ________ cannot be drawn without violating the octet rule. A) PO4 3- B) SiF4 C) CF4 D) SeF4 E) NF3 2) Alkenes have the general formula ________. A) CnH2n B) CnH2n-2 C) CnH2n+2 D) […]

1) The enthalpy change for the following reaction is -483.6 kJ: 2H2 (g) + O2 (g) → 2H2O (g) Therefore, the enthalpy change for the following reaction is ________ kJ. 4H2 (g) + 2O2 (g) → 4H2O (g) A) -483.6 […]

1) The square of Schrodinger’s wave equation is called an orbital. 2) Aldehydes are less reactive than ketones. Answer: FALSE 3) Radioactive decay is a first order kinetic process. Answer: TRUE 4) A gas is considered “ideal” if one mole […]

1) The principal component of smog is sulfur dioxide. 2) The concentration of reactants or products at any time during the reaction can be calculated from the integrated rate law. Answer: TRUE 3) Emulsifying agents typically have a hydrophobic end […]

1) A Lewis acid is an electron-pair acceptor, and a Lewis base is an electron-pair donor. 2) The larger the principal quantum number of an orbital, the lower is the energy of the electrons in that orbital. Answer: FALSE 3) […]

1) Atoms surrounded by eight valence electrons tend to lose electrons. 2) At constant temperature, reducing the volume of a gaseous equilibrium mixture causes the reaction to shift in the direction that increases the number of moles of gas in […]

1) Heats of vaporization are greater than heats of fusion. 2) In the formula k = 0.693/t1/2, k is the decay constant. Answer: TRUE 3) The extent of ionization of a weak electrolyte is increased by adding to the solution […]

1) When a metal gains an electron, the process is endothermic. 2) The reduction of O2 by sodium hydride produces lye. Answer: TRUE 3) In radioactive dating, the ratio of carbon-12 to carbon-14 is related to the time of death […]

1) The molecular weight is always a whole-number multiple of the empirical formula weight. 2) The DNA double helix is held together by hydrogen bonds and London dispersion forces. Answer: TRUE 3) In the reaction BF3 + F––> BF4 – […]

1) Air containing 4% H2 can be explosive. 2) The wavelength of radio waves can be longer than a football field. Answer: TRUE 3) In some molecules and polyatomic ions, the sum of the valence electrons is odd and as […]

1) If chloride is a ligand to a transition metal, it will not be precipitated by silver nitrate. 2) The principal source of the difference in the normal boiling points of ICl (97 oC; molecular mass 162 amu) and Br2 […]

1) The majority of glucose molecules exist in ring structure. 2) Nitrogen is colorless because the minimum energy to excite an electron is in the ultraviolet section of the spectrum. Answer: TRUE 3) The color of hemoglobin changes from purple […]

1) The rate limiting step in a reaction is the slowest step in the reaction sequence. 2) Ca(OH)2 is a strong base. Answer: TRUE 3) To separate racemic mixtures, the isomers must be in a chiral environment. Answer: TRUE 4) […]

1) The instability of xenon fluorides is due to its negative enthalpy of formation. 2) The quantity of product that is calculated to form when all of the limiting reagent reacts is called the actual yield. Answer: FALSE 3) Ozone […]

1) The relationship between the concentrations of reactants and products of a system at equilibrium is given by the law of mass action. 2) Possible shapes of AB3 molecules are linear, trigonal planar, and T-shaped. Answer: FALSE[/cpmembership] 3) The bond […]

1) 3.2 cm3 = 0.0032 L 2) Two deviations of real gases from ideal gases which are treated in the van der Waals equation are finite molecular volume and non-zero molecular attractions. Answer: TRUE 3) Gamma radiation only changes the […]

1) Under ordinary conditions, a substance will sublime rather than melt if its triple point occurs at a pressure above atmospheric pressure. 2) Ammonia is a strong base. Answer: FALSE 3) Xenon can have oxidation states of 2, 4, 6, […]

1) A federal administrative agency must alert small businesses-through advertising in trade journals, for example-about forthcoming regulations. 2) The term fiduciary is at the heart of agency law. Answer: T 3) Counterfeit goods copy or otherwise imitate trademarked goods, and […]