• 日期: 2026-07-30
  • 标签: 常规

  1. Which of the following molecules would be expected to have a dipole moment of zero because of symmetry? ( ) A. CS2 B. TeF2 C. SeCl4 D. H2O

  2. The molecule TeCl4 has a dipole moment of 2.54 D. Which of the following geometry is possible? ( ) A. tetrahedral B. seesaw C. square planar D. octahedral

  3. Which of the following molecule is expected to have the bond angle of 180º? ( ) A. OF2 B. H2O C. CO2 D. SO2

  4. What is the geometry of SiCl4? ( ) A. bent B. linear C. seesaw D. tetrahedral

  5. Which of the following ions has the largest ionic radius? ( ) A. F- B. Na+ C. N3- D. Li+

  6. Which of the following elements has the largest ionization energy? ( ) A. Na B. Ar C. Cl D. Al

  7. Which of the following is a metal that is normally a liquid? ( ) A. Br2 B. Li C. Hg D. Na

  8. Which of the following is an alkali metal in Period 4? ( ) A. Li B. Mg C. Ca D. K

  9. The following reaction absorbs 66.2 kJ of heat per 2 mol NO2 produced. What is the value of q? ( ) N2(g) + 2O2(g) → 2NO2(g) A. +66.2 kJ B. -66.2 kJ C. +33.1 kJ D. -33.1 kJ

  10. Platinum has a density of 21.4 g/cm3. What is the mass of 5.9 cm3 of this metal? ( ) A. 3.6 g B. 1.26 × 10^2 g C. 1.3 × 10^2 g D. 0.28 g

  11. Naturally occurring chlorine is a mixture of the isotopes Cl-35 and Cl-37. How many protons and how many neutrons are there in Cl-37? ( ) A. 17 protons, 17 neutrons B. 20 protons, 17 neutrons C. 20 protons, 20 neutrons D. 17 protons, 20 neutrons

  12. Which of the following element is in Group 3A and Period 2 of the periodic table? ( ) A. V B. B C. I D. He

  13. A sample of ethanol, C2H5OH, contains 4.2 × 10^23 hydrogen atoms. How many C2H5OH molecules are in this sample? ( ) A. 7.0 × 10^22 B. 4.2 × 10^23 C. 2.5 × 10^23 D. 8.4 × 10^22

  14. Which name of the following compounds is correct? ( ) A. CO: carbon dioxide B. K2SO3: sodium sulfite C. Hg3N2: mercury nitride D. CaCO3: calcium oxide

  15. How many moles of C4H10 in 78 g C4H10? ( ) A. 7.8 B. 78 C. 1.3 D. 13

  16. How many Br atoms in 32.0 g Br2? ( ) A. 4.0 × 10^23 B. 3.2 × 10^23 C. 0.40 D. 2.41 × 10^23

  17. What is the oxidation number I in IO3-? ( ) A. +1 B. +5 C. +7 D. -1

  18. How many milliliters of 0.126 M HClO4 are required to give 0.150 mol HClO4? ( ) A. 1.20 × 10^3 mL B. 1.50 × 10^3 mL C. 1.26 × 10^3 mL D. 1.19 × 10^3 mL

  19. Which of the following reactions will not occur? ( ) A. Al(OH)3 + HNO3 → B. NH4Br + AgNO3 → C. CaCl2 + NaNO3 → D. MgSO4 + Ba(NO3)2 →

  20. A sample of oxygen gas is placed into a container of 2.0 L. At constant temperature, if the volume of the container is changed to 1.0 L, how does the pressure change? ( ) A. Not sure. B. The pressure doesn’t change. C. The pressure increases by 50%. D. The pressure decreases by 50%.

  21. What volume will 5.67 g O2 be if the gas volume is measured at 23 ºC and 0.894 atm? ( ) A. 4.81 L B. 22.4 L C. 0.370 L D. 8.40 L

  22. A balloon is filled with helium gas to a volume of 2.68 L at 23 ºC and 789 mmHg. What would be the volume of helium if its pressure changed to 499 mmHg but the temperature was unchanged? ( ) A. 4.24 L B. 2.24 L C. 3.25 L D. 1.30 L

  23. Calculate the total pressure of a mixture of 0.0300 mol of helium, and 0.0400 mol of oxygen, in a 4.00 L flask at 20 ºC. ( ) A. 0.279 atm B. 0.421 atm C. 0.240 atm D. 0.0287 atm

  24. A 21.4 mL volume of hydrochloric acid reacts completely with a solid sample of MgCO3. The reaction is 2HCl(aq) + MgCO3(s) → CO2(g) + H2O(l) + MgCl2(aq) The volume of CO2 formed is 159 mL at 23 ºC and 731 mmHg. What is the molarity of the HCl solution? ( ) A. 0.294 mol/L B. 0.588 mol/L C. 0.0126 mol/L D. 0.214 mol/L

  25. Carbon disulfide burns in air, producing carbon dioxide and sulfur dioxide. CS2(l) + 3O2(g) → CO2(g) + 2SO2(g); ΔH =–1077 kJ What is ΔH for the following equation? CO2(g) + 2SO2(g) → CS2(l) +3O2(g) ( ) A. 1077 kJ B. -1077 kJ C. 538.5 kJ D. -538.5 kJ

  26. Light with a wavelength of 478 nm lies in the blue region of the visible spectrum. Calculate the frequency of this light. ( ) A. 4.78 × 10^19/s B. 6.27 × 10^19/s C. 6.27 × 10^14/s D. 4.78 × 10^14 /s

  27. If the n quantum number of an atomic orbital is 4, what are the possible values of l? ( ) A. 1, 2, 3, 4 B. 0, 1, 2, 3 C. -3, -2, -1, 0, 1, 2, 3 D. -4, -3, -2, -1, 0, 1, 2, 3, 4

  28. How many orbitals are there in the d subshell? ( ) A. 5 B. 4 C. 3 D. 2

  29. Which of the following sets of quantum numbers would be permissible for an electron, according to the rules for quantum numbers? ( ) A. n = 1, l = 0, ml = 0, ms = +1 B. n = 1, l = 3, ml = +3, ms = +½ C. n = 3, l = 2, ml = +1, ms = -½ D. n = 0, l = 1, ml = 0, ms = +½

  30. Which of the following orbital diagrams are allowed by the Pauli exclusion principle? ( ) A. [Orbital Diagram] B. [Orbital Diagram] C. [Orbital Diagram] D. [Orbital Diagram]

  31. Tellurium is a Group 6A element in Period 5. What would you expect for the valence-shell configuration of tellurium? ( ) A. 5s^2 5p^4 B. 5s^2 5p^6 C. 6s^2 6p^4 D. 6s^2 6p^6

  32. Thallium has the ground-state configuration [Xe]4f^145d^106s^26p^1. Which of the following statement is correct? ( ) A. It is a main-group element. B. It is a d-transition element. C. It is an f-transition element. D. It is a s-block element.

  33. For the element with Z = 20, give its group and period in the periodic table. ( ) A. group 4A, period 2 B. group 4A, period 4 C. group 2A, period 4 D. group 2A, period 2

  34. What hybrid orbitals would be expected for the central atom of BF3? ( ) A. sp1 B. sp2 C. sp3 D. sp4

  35. If the electron configuration of O2 is KK(σ2s)^2 (σ2s)^2 (π2p)^4 (σ2p)^2 (π2p)^2, what is the magnetic character of O2? ( ) A. paramagnetic B. diamagnetic C. not sure D. any one

  36. Which of the following bonds is least polar? (electronegativities: C 2.5; O 3.5; Cl 3.0; P 2.1; As 2.0; Br 2.8) ( ) A. P-O B. C-Cl C. As-Br D. C-Br

  37. Which of the following is a strong acid? ( ) A. C2H5OH B. H2CO3 C. H2O D. HBr

  38. Using solubility rules, predict which of the following is insoluble in water. ( ) A. K2S B. Li2CO3 C. NH4Br D. PbCl2

  39. Which is the answer of the following arithmetic equation? ( ) A. 55.669 B. 55.67 C. 56 D. 55.7

  40. What is the magnetic property of zinc (Zn)? ( ) A. Not sure. B. diamagnetic C. paramagnetic D. Both diamagnetic and paramagnetic

Answers

  1. A
  2. C
  3. C
  4. D
  5. C
  6. B
  7. C
  8. D
  9. +66.2 kJ
  10. C
  11. D
  12. B
  13. 2.5 × 10^23
  14. C
  15. 1.3
  16. 2.41 × 10^23
  17. +5
  18. 1.19 × 10^3 mL
  19. C
  20. C
  21. 0.370 L
  22. 4.24 L
  23. 0.240 atm
  24. 0.588 mol/L
  25. -1077 kJ
  26. 6.27 × 10^14 /s
  27. 0, 1, 2, 3
  28. 5
  29. C
  30. B
  31. 5s^2 5p^4
  32. B
  33. D
  34. sp2
  35. paramagnetic
  36. A
  37. D
  38. D
  39. B
  40. diamagnetic
Chemistry Multiple Choice Questions with Answers: Test Your Knowledge

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