Chemistry Sample Questions
Chemistry Sample Questions Name: ____________________________________________ 1) Which phase change represents deposition? A) liquid ‚ gas B) gas ‚ solid 2) 5) 3) C) solid ‚ liquid D) gas ‚ liquid A) increases B) remains the same Which pair has identical electron configurations? A) K0 and Na+ C) S2- and Cl- B) Cl- and K0 D) S0 and Ar0 As an Na atom forms an Na+ ion, the number of protons in its nucleus 4) C) decreases Which element exhibits a crystalline structure at STP? A) chlorine B) fluorine C) bromine D) iodine A student using a Styrofoam cup as a calorimeter added a piece of metal to distilled water and stirred the mixture as shown in the diagram below. The student's data is shown in the table below. Which of the following statements correctly describes the heat flow in joules? [Ignore heat gained or lost by the calorimeter.] A) B) C) D) 6) The water gained 5,685 joules of heat and the metal lost 5,685 joules of heat. The water lost 1,463 joules of heat and the metal gained 1,463 joules of heat. The water lost 5,685 joules of heat and the metal gained 5,685 joules of heat. The water gained 1,463. joules of heat and the metal lost 1,463. joules of heat. The chart below shows the change in vapor pressure of four 7) liquids with increasing temperature. Given the reaction: Ca + 2H2 O ‡‡ˆ Ca(OH)2 + H2 How many moles of H2 O are needed to react completely with 2.0 moles of Ca? A) 1.0 moles B) 2.0 mole 8) An atomic mass unit is defined as exactly A) the mass of a 12 C atom B) the mass of a 12 C atom C) the mass of a 16 O atom D) the mass of a 16 O atom What liquid has the lowest normal boiling point? A) A B) B C) C D) D C) 0.50 mole D) 4.0 moles 9) Which electron-dot diagram represents a molecule that has a polar covalent bond? 17) C) A) 18) D) B) 10) B) 15) 1 x 10-6 The diagram below represents radiation passing through an electric field. What type of emanation is represented by the arrow labeled 2? greater due to the larger surface area of A) alpha particle B) gamma radiation C) 19) 1 x 10-8 20) A) Pb 2+(aq) C) Zn(s) B) Pb(s) D) Zn 2+(aq) C) beta particle D) positron Which radioisotope is used to diagnose thyroid disorders? A) uranium-238 B) cobalt-60 D) 1 x 10-2 Which species acts as the anode when the reaction C) iodine-131 D) technetium-99 Which piece of laboratory equipment should be used to transport a hot crucible? A) Which sample represents a homogeneous mixture? A) C2 H5 OH(s) C) C2 H5 OH(aq) B) C2 H5 OH(g) D) C2 H5 OH(l) B) Human body temperature is 37D Celsius. What temperature does this correspond to on the Kelvin scale? C) A) 310 K B) -236 K D) C) 98.6 K D) 236 K The heat of fusion of water is 80 calories per gram. How many calories of heat would be required to completely melt 5 grams of H2 O(s) at 0DC to H2 O(l) at 0DC? A) 5 B) 40 16) D) NaNO3 greater due to the larger surface area of Zn(s) + Pb 2+(aq) ‡‡ˆ Zn 2+(aq) + Pb(s) occurs in a voltaic cell? 14) B) KNO3 greater due to the smaller surface area The [OH-] of a solution is 1 x 10-6 . At 298 K and A) 1 x 10-14 13) C) NH4 Cl greater due to the smaller surface area 1 atmosphere, the product [H3 O+][OH-] is 12) A) KCl Beaker A contains a 1-gram piece of zinc and beaker B contains 1 gram of powdered zinc. If 100 milliliters of 0.1 M HCl is added to each of the beakers, how does the rate of reaction in beaker A compare to the rate of reaction in beaker B? A) The rate in B is of the zinc. B) The rate in A is of the zinc. C) The rate in A is the zinc. D) The rate in B is the zinc. 11) At 10DC, 79 grams of a substance saturates 100. grams of water. The substance could be C) 400 D) 80 Which equation represents a neutralization reaction? A) NaOH + HCl ‡‡ˆ NaCl + H2 O B) Zn + CuSO4 ‡‡ˆ ZnSO4 + Cu C) AgNO3 + NaCl ‡‡ˆ AgCl + NaNO3 D) 2Na + 2H2 O ‡‡ˆ 2NaOH + H2 21) In a laboratory exercise to determine the density of a substance, a student found the mass of a substance to be 6.00 grams and the volume to be 2.0 milliliters. What is the density of the substance, expressed to the correct number of significant figures? A) 3.000 g/mL B) 3 g/mL C) 3.00 g/mL D) 3.0 g/mL 22) The diagram below represents an ionic crystal being dissolved in water. According to the diagram, the dissolving process takes place by A) dispersion forces of attraction B) molecule-ion attractions 23) In the particle diagrams below, C) network bond formation D) hydrogen bond formation represents an atom of sulfur and represents an atom of oxygen. Which diagram best represents the compound sulfur (VI) oxide? A) A B) B C) C D) D Answer Key 1881 - 1 - Page 1 CHEMISTRY (3ed), Ch 2 #54 Stds: (TEKS) (C.4)(A)R 1) B CHEMISTRY (3ed), Ch 5 #197 Stds: (TEKS) (C.6)(E)S 2) C CHEMISTRY (3ed), Ch 5 #46 Stds: (TEKS) (C.6)(A)S 3) B CHEMISTRY (3ed), Ch 6 #246 Stds: (TEKS) (C.5)(B)R 4) D CHEMISTRY (3ed), Ch 17 #98 Stds: (TEKS) (C.2)(G)PS 5) D CHEMISTRY (3ed), Ch 2 #80 Stds: (TEKS) (C.4)(A)R 6) A CHEMISTRY (3ed), Ch 8 #154 Stds: (TEKS) (C.8)(D)R, (C.8)(E)S 7) D CHEMISTRY (3ed), Ch 5 #58 Stds: (TEKS) (C.6)(D)S 8) A CHEMISTRY (3ed), Ch 7 #101 Stds: (TEKS) (C.7)(B)R 9) C CHEMISTRY (3ed), Ch 10 #78 Stds: (TEKS) (C.11)(D)S 10) D CHEMISTRY (3ed), Ch 12 #187 Stds: (TEKS) (C.10)(I)S 11) A CHEMISTRY (3ed), Ch 13 #186 Stds: (TEKS) (C.10)(H)R 12) C CHEMISTRY (3ed), Ch 1 #35 Stds: (TEKS) (C.4)(D)R 13) C CHEMISTRY (3ed), Ch 1 #164 Stds: (TEKS) (C.11)(D)S 14) A CHEMISTRY (3ed), Ch 1 #128 Stds: (TEKS) (C.11)(C)R, (C.11)(D)S, (C.11)(E)S 15) C CHEMISTRY (3ed), Ch 12 #224 Stds: (TEKS) (C.10)(G)S, (C.10)(H)R, (C.10)(I)S, (C.10)(J)S 16) A CHEMISTRY (3ed), Ch 9 #84 Stds: (TEKS) (C.10)(B)R, (C.10)(F)R, (C.10)(G)S 17) D CHEMISTRY (3ed), Ch 15 #28 Stds: (TEKS) (C.12)(B)R 18) B CHEMISTRY (3ed), Ch 15 #135 Stds: (TEKS) (C.12)(A)S 19) C CHEMISTRY (3ed), Ch 17 #41 Stds: (TEKS) (C.2)(D)PS Answer Key 1881 - 1 - Page 2 20) A CHEMISTRY (3ed), Ch 17 #67 Stds: (TEKS) (C.2)(F)PS 21) D CHEMISTRY (3ed), Ch 7 #215 Stds: (TEKS) (C.7)(E)S 22) B CHEMISTRY (3ed), Ch 4 #35 Stds: (TEKS) (C.7)(A)R 23) D
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