SAINT LOUIS UNIVERSITYSCHOOL OF ENGINEERING AND ARCHITECTURE DEPARTMENT OF CHEMICAL ENGINEERING MOCK BOARDS for PHYSICAL AND CHEMICAL PRINCIPLES 1. Which one of the following metals is most likely to be purified by electrolysis? a. silver b. lead c. iron d. manganese 2. Sodium cyanide is an important reagent in the metallurgy of ______________. a. manganese b. iron c. copper d. gold 3. If a cell did not have ribosomes, it would be unable to a. extract energy from b. form proteins c. store food in the form d. synthesize glucose glucose 4. Which of the following salts is expected to have the lowest solubility in water? a. NaCl b. NaI c. NaF d. NaBr 5. The vapour pressure of pure water at 26oC is 25.21 torr. What is the vapour pressure of solution which contains 20g glucose in 70g water? a. 24.5 torr b. 99.3 torr c. 65.2 torr d. 31.13 torr 6. What is the molecular weight, Ma, of a solute, A, if the osmotic pressure of a solution containing 10 g/L is 10 torr at 27˚C? a. 1165 g/mol b. 18700 g/mol c. 15600 g/mol d. 12800 g/mol 7. 18F is found to undergo 90% radioactive decay in 366 min. What is its computed half-life from this observation? a. 25 min b. 55 min c. 80 min d. 110 min 8. The easiest fusion reaction to initiate is between the nuclei of deuterium and tritium to produce an alpha particle. How much energy is released for every formation of an alpha particle? (deuterium = 2.01410 amu, protium = 3.01605 amu, alpha particle = 4.00460 amu). a. -1.889 x 10-5 J b. -2.820 x 10-12 J c. -1.680 x 10-10 J d. -4.569 x 10-5 J 9. The average molar mass of one base pair of nucleotides in DNA is approximately 600 g/mol. The spacing between successive base pairs is about 0.34 nm, and a complete turn in the helical structure of DNA occurs every 3.4 nm. If a DNA molecule has a molar mass of 4.5 x 109 g/mol, approximately, how many complete turns in the DNA α-helix structure? a. 6 x 105 b. 7 x 105 c. 8 x 105 d. 9 x 105 10. In the "Methode Champenoise," strawberry juice is fermented in a 825-mL wine bottle to produce sparkling wine. Fermentation of 719 mL aqueous strawberry juice is allowed to take place in the bottle until 12% by volume is ethyl alcohol. Calculate the pressure of CO2 inside the wine bottle at 29°C? (The density of ethanol is 0.79 g/cm3.) a. 150 atm b. 250 atm c. 350 atm d. 450 atm 11. Histidine, an essential α-amino acid present in our body can transform into histamine under enzymatic activity of histidine decarboxylase. When the reaction velocity is 2.6 mM/s, 1.67 mM of histamine is formed. Assuming 15 mM of the decarboxylase (Kcat = 30 s-1) is used, determine the Michaelis-Menten constant KM. a. 0.19 M b. 0.29 M c. 0.39 M d. 0.49 M 12. Calculate the energy released per mole of a helium nucleus produced from the fusion reaction of deuterium with tritium. The atomic masses of deuterium, tritium and helium are 2.01410 amu, 3.01605 amu and 4.00260 amu, respectively. a. -2.82 x 10-12 J b. -1.70 x 10-12 J c. -2.82 x 1012 J d. -1.70 x 1012 J 13. Determine the “third-life” for a nuclide that has a half life of 31.4 years. Hint: “Third-life” is defined in a similar way to “half- life”. a. 10.5 yr b. 20.9 yr c. 42.8 yr d. 49.7 yr 14. It has a brownish hue and is the compound that gives feces their characteristic odor. a. Biliverdin b. Stercobilin c. Bilirubin d. Urobilin 15. A 1.0 L buffer solution initially contains 0.25 mol NH3 and 0.25 mol NH4Cl. In order to adjust the buffer to a pH of 8.75, you should add a. 4.80g NaOH b. 18.6g NaOH c. 4.80g HCl d. 18.6g HCl 16. Consider two solutions A and B. [H+] in solution A is 470 times greater than that in solution B. What is the difference in the pH values of the two solutions? a. 3 x 10-12 b. 4 x 10-15 c. 1 x 10-14 d. 5 x 10-16 The NaOH used was standardized using 1. c. 28. 11. 30. In the titration of the properly prepared solution. 0.05% b. 0. 12. 95. 40.8% d. 2-Methyl-2-butene b. SAINT LOUIS UNIVERSITY SCHOOL OF ENGINEERING AND ARCHITECTURE DEPARTMENT OF CHEMICAL ENGINEERING MOCK BOARDS for PHYSICAL AND CHEMICAL PRINCIPLES 17. 4.30% c.2% c.0 mL H2SO4. Two moles of Acetaldehyde are produced when one mole of a starting hydrocarbon undergoes ozonolysis. Calculate the percentage of Ni present.0140 g per milliliter) and 0. What [I-] should be maintained in an aqueous KI solution to produce a solubility of 1.00 mL KCN (0. What is the normality of a nitric acid solution to be used as an oxidizing agent (reduced to NO) if it contains 55.00 N 22.50 g was analyzed for Ni by the cyanide volumetric method. HCl b.6666g c. 60. respectively. ether c. carboxylic acid 26. The jewelry contains gold and silver.89% 21. What is the complementary sequence? a. Ni c. Which of the following exhibits H-bonding? a.9666g 19. The element is a.350? a. 0. 19.0080 M c. The digested material is treated with excess NaOH and the liberated NH3 is caught in 25. Be b.3-Dimethyl-2-butene 24. The wavelength is found to be 3. In humans. 0. 2. 3. 2. 16. a. 12. Ba 31. b.24% 20.3 mL of the above standard NaOH.xH2O. MgO c. 1.5 x 10-9. The excess acid then requires 28. 35. PbS 32.00 g sample of pure NH4Cl as a primary standard and the liberated NH3 is caught in 25. a.6% . 23. a.00 g is analyzed for protein by the Kjeldahl method.42% d. after converting all the Fe to a precipitate of Fe2O3 . 10. NO2 d. HF c.0190 M 23. N b. a. CHCl3 30. The excess acid requires 11.5 g/cm3. oxytocin b. 5.0 mL NaOH). If the total volume of the jewelry is the sum of the volumes of the gold and the silver that it contains. state the purity of the gold jewelry in karats.0120 M b. CCAGATATG b. A sample of steel weighing 1. ketone d. 8. this chemical compound is released during hugging and touching in both genders.68 N d.8 mL acid 31. AAGTGTTAC d. adrenaline c.4666g b. G-Proteins d.685 cm 3. 0. serotonin 27.60% d.50% by mass HNO3 and has a specific gravity of 1. Mg c. 3-Methyl-3-hexanol can be prepared by reacting propyl magnesium bromide with what? a. Which of the following compounds is AROMATIC? a.2 d.6 b.86g of a mixture of 1-butene and butane was burned in excess oxygen. Which of the following is diamagnetic? a. Part of a certain DNA sequence is GGTCTATAC.6 c. CH4 d.3 g/cm3 and 10. TTGAGCGCA c. 3. LiF b. 2-Butene c.45 g and a volume of 0. 2. Calculate the percentage of protein in the milk. 0. 4.89 N b. CCGTGTCAG 25. Te d.14g of water were obtained. What could this hydrocarbon be? a. d. which have densities of 19. Consider a piece of gold jewelry that has a mass of 9.86666g d.80g of carbon dioxide and 4. ester b. Which of the following molecules/ compounds is formed by covalent bonds? a. a. Butene d.0040 M d.3% b.31 x 10 -3 pm. 12.42% c. a.6 18. Ca d.65 mL of AgNO 3 (0.0125 g per milliliter) were used.2 mL of NaOH (25.42% b.0 mL of the above H2SO4.79 N c. When 2. What weight of magnetite should be taken for analysis in order that. A sample of milk weighing 5. the percentage of Fe3O4 in the sample can be found by multiplying the weight in grams of the ignited precipitate by 100? a.8 x 10-5 mol PbI2 per liter of solution when PbI2 is added? Ksp of PbI2 = 6. 0. An atom of a particular element is travelling at 1% of the speed of light. 0. Sr 29. Calculate the percentage by mass of butane in the original mixture. a negatively charged hydrogen ion containing a pair of electrons b. Third period atoms may have up to 12 electrons around them b.5 x 10-11) a. rinsed free of impurities. 26 d. Which of the following is used for making the explosive 'TNT'? a. amines c. What is the oBe’ of the acid solution? a. mass b. for liquids only d. and dried to a constant weight. sodium butyrate 42.00 atm pressure and 17°C developed a leak. Do ppm denote a concentration that is a mole ratio? a.75 mg sample of a foot powder was titrated with 27. 1.84 x 10-4 mg c.654 kgmol/hr c.67 x 10-4 mg b. shell b. A 10L cylinder of oxygen at 4. 0. 134 ppm b.794 kgmol/hr 39. 245 ppm 36. for gases only b.180 g of metal upon reaction with excess hydrochloric acid produced 24. Cetosote 47.27 ml of 0. major energy level c. 0. The following are acid salts except. Benzol b. alcohols b.2185. one sigma bond and two pi bonds d. 34. 37 41. phenols d. contain the same number of molecules 38. 90 d.132 kgmol/hr b. mole c. ethyl propionate c. Which of the following describes a triple bond? a. Pure chlorine gas enters a process.56% c. Toluene c. a positively charged hydrogen ion c. How many moles of gas escaped? a. atomic orbital 46.4 kg of chlorine pass into the process every 3.50 atm of oxygen remained in the cylinder. 36 b.45% d. 213 ppm d. 31 b. a. precipitating the SO42– as BaSO4. The solution contains how much iron? a.7-mg sample containing a mixture of K2SO4 and (NH4)2SO4 was dissolved in water and treated with BaCl2. 0.822 mg 49.34% b. 45 c. contain one molecule each d. a.467 mg d. have a mass of one gram each b. 4. a proton containing an extra electron 44. By measurement it is found that 2.73 mL of 0. volume d. 184 ppm c. SAINT LOUIS UNIVERSITY SCHOOL OF ENGINEERING AND ARCHITECTURE DEPARTMENT OF CHEMICAL ENGINEERING MOCK BOARDS for PHYSICAL AND CHEMICAL PRINCIPLES 33. 45.01200 M EDTA . amino acids 48. 0.22% 35. The Lucas test is used to determine the types of a. yielding 863. Calculate the molar flow rate of the chlorine in kg mol/hr. 0. A 516. All contributing structures must obey the rules of covalent bonding d.870 kgmol/hr d. 0. Calculate the %Zn in the sample. 0. two sigma bonds and two pi bonds c. 45 c. 0.01690 EDTA. How many milligrams of BaCrO4 are dissolved in 200 ml of saturated solution? (Ksp of BaCrO4 is 8. A mixture is reported as 15% water and 85% ethanol. ammonium acetate b. 2. core d. 0.389 moles d.621 moles b. Which statement about resonance structures is false? a. a hydrogen ion containing a single electron d. Which of the following describes a hydride ion? a. A(An) ____ is a region of space in which there is a high probability of finding an electron in an atom. 180 50. The position of nuclei may change c. Pyridine d. Should the percentages be deemed to by a. three pi bonds 45. 65.5 mg of BaSO4. The resulting precipitate was isolated by filtration. . 0.1 minutes. still at 17°C. have the same mass c. for solids only c. When the leak was repaired. A 30% H2SO4 solution at 20oC has a specific gravity of 1. A 50.00-mL aliquot of a solution containing iron(III) required 13. calcium formate d. a. 22.630 moles c. All contributing resonance structures must have the same number of valence electrons 43. What is the equivalent weight of the metal? a.6 ml of hydrogen gas at 270C and 1 atmospheric pressure. all of the given 37. Zinc in a 565. 0. two sigma bonds and one pi bond b. for solids and liquids 40. What is the %w/w K2SO4 in the sample? a.397 moles 34. A mole of water and a mole of oxygen a. The general formula for its oxide is a. a. 8 mg/L c. plastic industry wastewater flow of 515m3/day with a 5-day BOD concentration of 950 ppm and cooking oil wastewater flow of 350 m 3/day with a 5-day BOD concentration of 450 ppm. a. titration curve .1 ppm 55. The sanitary and industrial waste from a community consists of domestic wastewater from several population of 10. a. X2O3 b. H2S c. 12 mg/L d. 1500 d. Given: HCN(aq) H+(aq) + CN-(aq).09 d. photosynthesis 54. the ionization of the weak electrolyte is suppressed.44 minutes. 15.10 M sodium formate. X3O2 c. 15 mg/L 57. common ion effect c. Cl 59.0 gram sample is left after 15 years? a. When a solution of weak electrolyte is altered by adding one of its ions from another source. 13. decomposition d.60 65. 2900 58. 1/2 c. 0. 0. A radial flow impeller with six flat-blades mounted on a disk is called a. The time taken for a certain volume of gas to steam through a small hole was 1. 966 c. 4. One shot of the liquor having a volume of 35 ml contains a. 2. 0. Determine the 1 day BOD of a sample wastewater if its BOD5 is 135 mg/L with a rate constant of 0. 37. The half-life of Cs-137 is 30 years. 3. cause the reaction to shift to the right 64. The resulting precipitate is probably a. XO3 66. 1. 9. What is the pH of an HCN solution that is 0.5 mL isopropyl alcohol b. A specific brand of liquor is rated 75 proof.55 mg/L. fermentation d. This behavior is termed the ____. 0. meat processing waste of 180 m3/day containing 1500 mg/L of 5-day BOD. Calculate the pH that results when the following solutions are mixed: 35 ml of 0.80 minutes to pass.87 60. Rushton turbine b. Calculate the initial DO of the diluted sample if the 5 day BOD is 30 ppm. decrease the concentration of NH3(g) at equilibrium b.23/day.4kJ Adding N2 to the reaction will a. glycolysis c. 2NiS(s) + 3O2(g) 2NiO(s) + 2SO2(g) a.43 g/L) is: a. F d.1 mL ethyl alcohol 52.69 c. 55 ml of 0.9 x 10-10. Consider the reaction: 2NH3(g) N2(g) + 3H2(g) ∆H=92. 5 mg/L b. 32.31 b. 5. A 35 ml sample of wastewater is diluted to a volume of 300 ml. combination c.5% 51.41 61. What is the 5-day BOD concentration of the combined wastewater in mg/L? a. 0. The approximate density of the gas relative to oxygen (ρoxygen = 1. buffer effect d. 110 ml of water a. 5.000 persons. respiration b.56g b.65% c.1 ppm c. 877 b. 13. benzoic acid c. CH3 b. sodium chloride b.71g c. sodium benzoate d.0% d.58 b. 10. 1/8 d. How much of a 1.5 mL ethyl alcohol d.64 c. 0.39 d. a. Classify the following reaction by giving the reaction type that applies. Under exactly the same condition equal volume of oxygen took 1. equivalence point b. decrease the concentration of H2(g) at equilibrium c.5 ppm b. displacement 62. Conversion of solar energy to chemical energy occurs during a.96g 53. 4. propeller c.92 d. If X represents an element in Group IIIA. XO d. 1/4 63. 40. 12. 0. 3. increase the value of the equilibrium constant d.135M initially? The K a of HCN is 4. 197. 51.33% b.79 c. Soap is dissolved in hot water and the solution is cooled and neutralized with HCl. aerator d. 1/3 b. For a face-centered cubic unit cell.1 mL isopropyl alcohol c. redox b. each corner contributes _____ lattice points to the unit cell a. 4.85g d.20 M formic acid. sodium stearate 67.23 b. The odor and presence of this chemical should be controlled due to the toxicity attributed to it a. after which a 5 day incubation resulted to a dissolved oxygen content of 4. paddle 56.6 ppm d. SAINT LOUIS UNIVERSITY SCHOOL OF ENGINEERING AND ARCHITECTURE DEPARTMENT OF CHEMICAL ENGINEERING MOCK BOARDS for PHYSICAL AND CHEMICAL PRINCIPLES a. 37. Ag 73. ultra micro 69.CH . remove CO2 c. The saponification no.058A b.37 x 103 0 0 0 74. 6 c. 4. aldehyde c. ester 83. Fe c. formed by the condensation of vapors by sublimation or other chemical processes. a. Which of the following is NOT a reason on why we need to add lime in lime-soda softening? a. 9 d.11 g c. 1.35 hrs d. raise pH d. The average MW of the triglyceride is a.048A c. Each clarifier is 16 ft wide. 20 C and 25 C respectively. Reingleman chart is used for the evaluation of __________ pollution. 10. elimination 81. -46. Which one of the following metals is most likely to be purified by electrolysis? a.83 oC d. 660 g d. 12 86. 0. The overlap of the 2p atomic orbitals produces ____ sigma molecular orbitals and ____ pi molecular orbitals. water c. the final temperature is 180C and when equal masses of the last two liquids are mixed.64 g b. The organic reaction represented by equation CH3 .027A 76.117 77. a. dust 71. The temperature of three different liquids are maintained at 15 C. destroy H2CO3 70. NO2(g) + H2O( ) HNO3(aq) + NO(g) S0 (J/mol•K) 240 69. ketone b.172 b. 0. 345 g b.4 b. 15. SAINT LOUIS UNIVERSITY SCHOOL OF ENGINEERING AND ARCHITECTURE DEPARTMENT OF CHEMICAL ENGINEERING MOCK BOARDS for PHYSICAL AND CHEMICAL PRINCIPLES 68. 0. Evaluate S0 (J/K)for the reaction below at 25°C and 1 atm.1M NH3 (Kb = 1. 0. Determine the detention time in hours. What temperature will be achieved by mixing equal masses of the first and last liquid? a. condensation d. oxidation c.2 c. 280 c. What weight of ice could be melted at 00C by the heat liberated by condensing 100g steam at 1000C to liquid? Heat of vaporization = 540 cal/g Heat of fusion = 80 cal/g a. synthetic detergent 85.91 146 210. 3 b. 675 g c. micro c. a.034A d. 1.2 b. 200 b.65 oC b.57 oC 75. a. 0. fog c. Functional group which causes vanilla odor. meso b. 2. Walking briskly dissipates energy at 500W. Analytical methods taking 1-10 mg. At the end of this time. Solid particle frequently metallic.2 d. The average person generates about 2500 kcal of heat a day. fume d. What fraction of the day’s energy does walking for an hour represents. addition b. 840 84. carboxylic acid d. 52 min c. the final temperature is 240C. 378 g 78. 0. air b.0020 equivalent of liberated I2.NH + H2O is an example of reaction a. When equal masses of the first two liquids are mixed. What is the total number of completely or partially filled p-orbitals in 33As atom in its ground state configuration? a. 3. of a triglyceride is 200. Calculate the mass of 95%w NH4Cl salt necessary to prepare two liters of buffer solution of pH =8 with 500 mL of 0. a. 50.200 c. A constant direct current flows through an iodine coulometer for a period of 2 hours.48 g d.2 82. What was the current passing through the coulometer? a.430 d. noise d. radioactive 72. Size samples for analysis maybe referred to as methods a.7 a. 28 min b. spray b.12 hrs 79. 8. Mn b.CH = O + H2NOH gives CH3 . 4. macro d. A water treatment plant has 4 clarifiers treated 4 MGD of water. 80 ft long and 15 ft deep.79 d. Whose rule delineates the placement of additional electrons in the unfilled orbital of lowest energy? . 0. 23. wax c. -287. 2. soap b. ROSO2ONa is a general formula for a. Pb d. 0.79 c.8 x 10-5) a. fatty acid salt d.30 oC c. it is found that the coulometer contains 0. 48. 1. 46. 1. 600 d. remove NCH b. a.56 g 80. 25 cm2 b. What is nhi for this transition? Rydberg constant equals 2. 276 ppm d. a.63 x 10-34/sec and C3 metal is sensitive to real light of 700 nm.44 c. What number of electrons that can be removed from metallic cesium with the energy required to remove one electron from an isolated cesium atom a.66 b. 0. NH3 (g) + Cl2 (g) N2 (g) + HCl (g) a. 206Pb has a relative abundance of 23. Calculate the vapor pressure of water at this temperature.Which organ is especially sensitive to a vitamin deficiency? a. Vitamin K c. Assume the following. the ionization potential of C3 = 3. sodium ion d. 26 torr 93. Be b. 27 oC d. 25 oC c. SAINT LOUIS UNIVERSITY SCHOOL OF ENGINEERING AND ARCHITECTURE DEPARTMENT OF CHEMICAL ENGINEERING MOCK BOARDS for PHYSICAL AND CHEMICAL PRINCIPLES a. The wavelength is found to be 3. Based from the preceding problem.0 L Cl2 in a closed container. 1:1 d. 1. At a certain temperature.89 eV. 6 b. What is the mean MW of a sample of fat with a saponification number of 100. 3:2 94. 4:3 c. 4 d.00-L sample of O2 was collected over water at a total pressure of 785 torr. 21 oC b. If the efficiency of the process is 68%. 20 torr b.7 cm2 90. what exactly was the temperature in which the sample might have been incubated? a. The water sample from a sewage plant had a 20-day BOD of 400 mg/L at 200C. 318 mg/L b. Based from the preceding problem. 24 torr d. 3:4 b. if the water were polluted and had an ultimate BOD of 431 mg/L between 20-30oC.74 x 10-6m. A line in Pfund series (nlo = 5) occurs at 3. The element is a. 369 mg/L d. a. liver c. 339 s b. h = 6. heart d. 2.35 g/cm3? a. 13 99. 7 c. Pauli 87. What was the expected 5-day demand? a. Hund d. 10. A 5 amp current is passing for 3 hours and 30 minutes through this electrolytic cell in which iron metal is deposited on the cathode. Mg c. Calculate the ratio of pressures in the container (Pfinal : Pinitial). 7. 12. 160 b.01 cm2 d.18 x 10-18 J. 9 89.0 L of NH3 is reacted with 5. a. a. 8 d. Measured at the same conditions. A lab technician may prevent a blood sample from clotting by adding a compound that prevents from entering the clotting process. 29 oC 97.6%. Consider two reaction vessels A and B. Calculate the time that must pass to reach the condition such that [A] t = 6.19 98. a.70 x 10-3 s-1 respectively. 8.07 cm2 c. 2 b. When the O2 was dried. 673s d. 334 mg/L c. 890s 92.31 x 10 -3 pm. 3 c. 5. if the sample had been incubated at 15oC. 168 d. What size of Pb will contain 8. calcium ion 100. where [A]o = [B]o at t=0. Aufbau b. potassium citrate b. the gas had a volume of 1. Ca d. An atom of a particular element is travelling at 1% of the speed of light.50 x 10-4 s-1 and 3. 167 c.94 L at 785 torr while temperature was kept constant. 169 88. 22 torr c.34 x 10 21 atoms of 206Pb if the density of Pb is 11. 2. lungs . 304 ppm c. A and B decompose by 1st order reaction with reaction constants of 4. skin b. 381 mg/L 96. Avogadro c. 580s c.58 [B]t. Sr 91. what would the 20-day demand have been a.26 d. 404 ppm b. 196 ppm 95. 1. how many grams of iron are deposited? a.