Chapter 2 Compounds and Chemical Reactions. 6. The number of atoms in one formula unit of the substance, CO(NH 2 ) 2, is
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1 Chapter 2 Compounds and Chemical Reactions Multiple Choice 1. Which one of the following elements exists as a diatomic molecule when it is in the free state? a. H b. He c. Li d. Be e. B 6. The number of atoms in one formula unit of the substance, CO(NH 2 ) 2, is a. 4 b. 5 c. 6 d. 7 e How many atoms are there in one formula unit of NiSO 4 7H 2 O? a. 9 b. 14 c. 27 d. 28 e Which one of the following compounds is correctly described as a hydrate? a. CoCl 2 6H 2 O b. HC 2 H 3 O 2 c. NaOH d. CaH 2 e. C 6 H 12 O Which one of the following compounds is correctly described as a hydrate? a. CaH 2 b. MgSO 4 7H 2 O c. H 2 O d. HCl e. NaOH 24. Which one of the following is correctly classified as a hydrocarbon? a. C 6 H 12 O 6 b. C 8 H 16 c. HC 2 H 3 O 2 20
2 d. NaHCl e. C 2 H 5 OH 25. The common name for the compound, CH 4, is a. carbon(iv) hydride b. carbon tetrahydride c. hydrocarbonate d. methane e. carbonic acid 27. What is the correct name for the compound IBr 3? a. bromic iodide b. iodine bromate c. iodine tribromide d. iodine tribromine e. monoiodine tribromite 28. What is the correct name for the compound S 2 Cl 2? a. disulfur chlorate b. disulfur dichloride c. disulfur dichlorine d. sulfur(i) chloride e. sulfur(ii) chlorine(ii) 29. What is the correct name for the compound HI(g)? a. hydriodic acid b. hydrogen monoiodide c. hydrogen iodide d. iodic acid e. monohydrogen monoiodide 30. What is the correct name for the compound HCN(g)? a. hydrocarbonitride b. hydrocyanic acid c. hydrogen carbonitride d. hydrogen cyanate e. hydrogen cyanide 31. A typographical error on an exam produced the formula, P 4 Se 7, in one of the questions. How would you name this compound? a. tetraphosphorus hexaselenide b. tetraphosphorus heptaselenide c. phosphorus heptaselenite d. phosphorus(iv) selenide 21
3 e. phosphorus(vii) selenide 32. When barium metal reacts with chlorine gas it forms an ionic compound, BaCl 2. In the course of the reaction, each Ba atom a. loses two protons b. loses two electrons c. gains two protons d. gains two electrons e. loses two neutrons 33. When barium metal reacts with chlorine gas it forms an ionic compound, BaCl 2. In the course of the reaction, each Cl atom a. loses one proton b. loses one electron c. gains one proton d. gains one electron e. loses one neutron 34. An alkaline earth element, which we will represent by the symbol X, unites with a halogen, which we will represent by the symbol Q. What would be the correct formula of the resulting compound? a. XQ b. XQ 2 c. XQ 4 d. X 2 Q e. X 4 Q 35. Aluminum unites with a second element, which we will represent by the symbol E, to form a definite compound whose formula is AlE 3. Element E is most probably a. an actinide element b. an alkali metal c. a chalcogen d. a halogen e. a transition element 36. The correct formula for the compound formed between arsenic (As) and hydrogen is a. AsH b. As 2 H c. AsH 2 d. As 3 H e. AsH The correct formula for the compound formed between antimony(sb) and hydrogen is a. SbH b. SbH 2 22
4 c. SbH 3 d. SbH 4 e. SbH Which one of the following formulas is incorrect because it does not represent a known ionic compound? a. BaCl 2 b. Al 2 F 3 c. NaO 2 d. RbBr e. CaO 39. What is the correct name for the compound V 2 O 5? (Remember, for transition metals...) a. divanadium pentoxide b. vanadic oxide c. vanadium(v) oxide d. vanadium(v) pentoxide e. vanadous oxide 40. What is the correct name for the compound NaCl 3? a. sodium chlorate b. sodium chlorite c. sodium perchloride d. sodium trichloride e. there is no such compound 41. What is the correct name for the compound CuBr 2? (Remember, for transition metals...) a. copper(i) bromide(ii) b. copper(ii) bromide c. copper(ii) bromite d. copper dibromide e. cuprous bromide 42. What is the correct name for the compound Na 2 O? a. disodium oxide b. sodium oxide c. sodium(i) oxide d. sodium peroxide e. sodium superoxide 43. Which one of the following is a correct name for the compound FeBr 3? a. ferrous bromide b. iron(iii) bromide c. iron bromite 23
5 d. iron tribromide e. iron tribromine 44. Which one of the following is the correct formula for the compound ferrous sulfate? a. FeSO 4 b. Fe(SO 4 ) 2 c. Fe 2 SO 4 d. Fe 2 (SO 4 ) 3 e. Fe 3 (SO 4 ) Which one of the following is a correct name for the compound Hg 2 Cl 2? a. dimercury dichloride b. mercuric chloride c. mercury(i) chloride d. mercury(ii) dichloride e. there is no correct name, the formula should be HgCl 46. Which one of the following is a correct formula for mercury(i) phosphate? a. HgPO 3 b. HgPO 4 c. Hg 3 PO 4 d. Hg 2 PO 3 e. (Hg 2 ) 3 (PO 4 ) Which one of the following is a correct name for the compound CoF 3? a. cobalt fluoride b. cobalt trifluoride c. cobaltic fluoride d. cobaltic trifluoride e. cobaltous fluoride 48. A correct name for the compound, SnF 4, would be a. stannic tetrafluoride b. stannous fluoride c. stannous(iv) fluoride d. tin(iv) fluoride e. tin tetrafluoride 49. A correct formula for stannous nitrate would be a. Sn(NO 2 ) 2 b. Sn(NO 3 ) 2 c. Sn(NO 3 ) 3 d. Sn(NO 3 ) 4 e. Sn 2 NO 3 24
6 50. What is the correct formula for the compound, magnesic chlorate? a. MgClO 3 b. Mg(ClO 3 ) 2 c. Mg 2 ClO 3 d. MgO(ClO 3 ) 2 e. there is no such compound 51. What is the correct name for the compound BaSeO 3? a. barium selenate b. barium selenide c. barium selenite d. barium selenium trioxide e. barium selenoxate 52. What is the correct name for the compound Na 2 Cr 2 O 7? a. sodium chromium(vii)ate b. sodium dichromate c. sodium dichromium heptaoxide d. sodium heptaoxochromate e. sodium perchromate 53. The compound Na 2 S 2 O 3 is used extensively in photographic film processing. What is its chemical name? a. sodium bisulfite b. sodium disulfur trioxide c. sodium oxosulfate(iv) d. sodium thiosulfate e. sodium trioxosulfite 54. What is the correct name for the compound Na 2 Cr 2 O 7? a. sodium chromate b. disodium chromate c. disodium bichromate d. sodium dichromate e. disodium dichromium heptaoxide 55. If the NtO 4 2 ion is called nortonate, what is the correct name for the compound K 2 NtO 4? a. dipotassium nortonium tetraoxide b. dipotassium nortonate c. potassium nortonate d. potassium(i) nortonate e. potassium(ii) nortonate 25
7 56. What is the correct name for the compound Cu 2 SO 3? a. copper(i) sulfite b. copper(ii) sulfite c. copper thiosulfate d. cuprous sulfate e. dicopper sulfur trioxide 66. The correct formula for the compound formed from strontium ion and chromate ion is a. SrCrO 3 b. SrCrO 4 c. Sr 2 CrO 4 d. Sr(CrO 4 ) 2 e. Sr 2 (CrO 4 ) The correct formula for the phosphate ion is a. PO 4 2 b. PO 4 3 c. PO 4 d. P 2 O 4 e. P 2 O The correct formula for the carbonate ion is a. C 2 H 3 O 2 b. C 2 O 4 2 c. CO 2 d. CO 3 e. CO The correct formula for the compound formed from the magnesium ion and the chromate ion is a. MgCrO 3 b. MgCrO 4 c. Mg 2 CrO 4 d. Mg (CrO 4 ) 2 e. Mg 2 (CrO 4 ) Which one of the following compounds is correctly described as a hydride? a. CoCl 2 6H 2 O b. HC 2 H 3 O 2 c. NaOH d. CaH 2 e. C 6 H 12 O The correct name for the compound Al(SO 4 ) 3 is: 26
8 a. there is no compound with that formulait must be incorrectly written b. aluminum sulfate c. aluminum trisulfate d. aluminum(iii) sulfate e. aluminum sulfite 76. Which one of the following is the correct name for the compound, V(NO 3 ) 3? a. vanadium trinitrate b. vanadium nitrite c. vanadium(iii) nitrite d. vanadium nitrate e. vanadium(iii) nitrate 77. Which one of the following is the correct name for the compound, Ba(NO 3 ) 2? a. barium dinitrate b. barium dinitrite c. barium nitrate d. barium(ii) nitrite e. barium(ii) nitrate 27
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