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South Carolina State University Chapter 4
Department of Biological and Physical Sciences
General Chemistry I, C 150 -07 Hamidi
Multiple Choice: Identify the letter of the choice that best completes the statement or answers the question.
____ 1. Which of the following responses contains all the true statements and no others?
I. The elements at the far right of the periodic table, except the noble gases, have the greatest tendency to form anions. II. The elements with the least tendency to form ions are those at the far left of the periodic table. III. Bonds in compounds consisting of two adjacent elements in the periodic table are likely to be covalent. IV. The elements at the far left of the periodic table possess poor electrical conductivity.
a. I and III b. I, II, and IV c. II and IV d. I, II, and III e. IV
____ 2. Which element and group are not correctly matched?
Element Periodic Group or Classification
a. Sb^ metalloid b. Kr^ noble gas c. Al^ alkali metal d. F^ halogen e. Ca^ alkaline earth metal
____ 3. Which one of the following compounds is not a salt? a. LiI b. Al(ClO 4 ) 3 c. HI d. Fe(ClO 3 ) 3 e. NH 4 Br
____ 4. Which one of the following is a weak acid? a. HBr b. HNO 3 c. HClO 4 d. HCl e. HClO 2
____ 5. Which one of the statements below is false concerning the following reaction:
NH 3 (g) + H 2 O(l) NH 4 +(aq) + OH-(aq)
a. The double arrows indicate that ammonia, NH 3 , is only very slightly soluble in water. b. The reaction is reversible. c. When NH 3 is added to H 2 O, NH 4 +^ and OH-^ ions are produced in a 1:1 ratio. d. When solutions of NH 4 Cl and NaOH are mixed, some ammonia is produced. e. Ammonia is considered a weak base.
____ 6. Which one of the following compounds is incorrectly identified as to type of compound?
Substance Type of Compound
a. KOH strong base b. HClO^4 strong acid c. HNO 2 weak acid
d. NH 3 insoluble base e. H 2 SO 3 weak acid
____ 7. Which one of the following salts is insoluble in water? a. MgSO 4 b. KNO 3 c. AgBr d. FeCl 3 e. NaBr
____ 8. Which one of the following compounds is not a strong electrolyte? a. RbF b. Ni(ClO 3 ) 2 c. Mg(NO 3 ) 2 d. HF e. HNO 3
____ 9. Which response includes all of the following substances that are strong electrolytes, and no others?
I. Na 2 SO 4 II. HCN III. KClO 3 IV. Mn(OH) 3
a. II, III, and IV b. I and II c. II and IV d. I and III e. I, III, and IV
____ 10. What is the total ionic equation for the following formula unit equation?
BaCl 2 (aq) + Na 2 SO 4 (aq) โ BaSO 4 (s) + 2NaCl(aq)
a. (^) [Ba2+(aq)+Cl-(aq)] + [Na+(aq)+SO 4 2-(aq)] โ BaSO 4 (s) + [Na+(aq)+Cl-(aq)] b. [Ba2+(aq)+2Cl-(aq)] + [2Na+(aq)+SO 4 2-(aq)] โ BaSO 4 (s) + 2[Na+(aq)+Cl-(aq)] c. (^) [Ba2+(aq)+2Cl-(aq)] + 2[Na+(aq)+SO 4 2-(aq)] โ BaSO 4 (s) + 2[Na+(aq)+Cl-(aq)] d. [Ba2+(aq)+2Cl-(aq)] + [Na+(aq)+SO 4 2-(aq)] โ BaSO 4 (s) + [Na+(aq)+Cl-(aq)] e. (^) Ba2+(aq) + SO 4 2-(aq) โ BaSO 4 (s)
____ 11. What is the total ionic equation for the following formula unit equation?
HF(aq) + KOH(aq) โ KF(aq) + H 2 O(l)
a. (^) [H+(aq)+F-(aq)] + [K+(aq)+OH-(aq)] โ [K+(aq)+F-(aq)] + [2H+(l)+O2-(l)] b. (^) [H+(aq)+F-(aq)] + [K+(aq)+OH-(aq)] โ [K+(aq)+F-(aq)] + H 2 O(aq) c. (^) HF(aq) + [K+(aq)+OH-(aq)] โ [K+(aq)+F-(aq)] + H 2 O(l) d. (^) HF(aq) + [K+(aq)+OH-(aq)] โ [K+(aq)+F-(aq)] + [2H+(aq)+OH-(aq)] e. (^) HF(aq) + OH-(aq) โ F-(aq) + H 2 O(l)
____ 12. What is the total ionic equation for the following formula unit equation?
2HClO 3 (aq) + Sr(OH) 2 (aq) โ Sr(ClO 3 ) 2 (aq) + 2H 2 O(l)
a. (^) 2HClO 3 (aq) + 2OH-(aq) โ 2ClO 3 - (aq) (^) + 2H 2 O(l) b. (^) 2H+(aq) + 2OH- (aq) โ 2H 2 O(l) c. (^) 2H+(aq) + Sr(OH) 2 (aq) โ Sr2+(aq) + 2H 2 O(l) d. (^) 2[H+(aq)+ClO 3 - (aq)] + [Sr2+(aq)+2OH-(aq)] โ [Sr2+(aq)+2ClO 3 - (aq)] + 2H2O(l) e. (^) 2[H+(aq)+ClO 3 - (aq)] + [Sr2+(aq)+2OH-(aq)] โ [Sr2+(aq)+2ClO 3 - (aq)]+[2H+(l)+O2-(l)]
____ 13. What is the net ionic equation for the following formula unit equation?
2MnO 4 - (aq) + 3S2-(aq) + 4H 2 O(l) โ 2MnO 2 (s) + 3S(s) + 8OH-(aq)
a. MnO 4 - , oxidized b. S2-, oxidized c. MnO 4 - , reduced d. S2-, reduced e. H 2 O, reduced
____ 21. Which of the following is both a decomposition reaction and a reduction-oxidation reaction? a. (^) H 2 CO 3 (aq) โ CO 2 (g) + H 2 O(l) b. (^) Zn(s) + CuNO 3 (aq) โ Cu(s) + ZnNO 3 (aq) c. (^) Ca(OH) 2 (aq) + 2HCl(aq) โ CaCl 2 (aq) + 2H 2 O(l) d. (^) 2NH 4 NO 3 (s) โ 2N 2 (g) + O 2 (g) + 4H 2 O(g) e. (^) CaCO 3 (s) โ CaO(s) + CO 2 (g)
____ 22. Which of the following reactions is not a decomposition reaction? a. (^) C 4 H 8 (g) + 6O 2 (g) โ 4CO 2 (g) + 4H 2 O(l) b. (^) Na 2 CO 3 (s) โ Na 2 O(s) + CO 2 (g) c. (^) 2KClO 3 (s) โ 2KCl(s) + 3O 2 (g) d. (^) 2H 2 O(l) โ 2H 2 (g) + O 2 (g) e. (^) BaSO 3 (s) โ BaO(s) + SO 2 (g)
____ 23. Which one of the following metals is least active? a. Ca b. K c. Pt d. Li e. Al
____ 24. Which response includes all of the following reactions that will occur in aqueous solution, and no others?
I. (^) 2NaF(aq) + Cl 2 (g) โ 2NaCl(aq) + F 2 (g) II. 2NaCl(aq) + I 2 (s) โ 2NaI(aq) + Cl 2 (g) III. (^) 2NaBr(aq) + Cl 2 (g) โ 2NaCl(aq) + Br 2 (l) IV. 2NaI(aq) + Br 2 (l) โ 2NaBr(aq) + I 2 (s) V. (^) 2NaBr(aq) + I 2 (s) โ 2NaI(aq) + Br 2 (l)
a. I, II, and III b. III and IV c. II, IV, and V d. I and III e. III, IV, and V
____ 25. Which of the following represents the net ionic reaction for all strong acid / strong base reactions that produce a soluble salt? a. (^) 2H+(aq) + 2e- โ H 2 (g) b. 2H+(aq) + 2H 2 O(l) โ 4OH-(aq) c. (^) H+(aq) + OH-(aq) โ H 2 O(l) d. H 2 O(l) + OH-(aq) โ O 2 (g) + 3/2H 2 (g) e. (^) 2H+(aq) + O2-(aq) โ 2H 2 O(l)
____ 26. Write the formula unit equation for the complete reaction of Ca(OH) 2 with H 2 S. What is the sum of the coefficients? (Do not forget coefficients of one.) a. 6 b. 7 c. 3 d. 4 e. 5
____ 27. Identify the net ionic equation for the reaction of HClO 2 and lithium hydroxide. a. (^) HClO 2 (aq) + OH-(aq) โ ClO 2 - (aq) + H 2 O( l )
b. (^) HClO 2 (aq) + 2OH-(aq) โ ClO 2 - (aq) + 2H 2 O( l ) c. 2HClO 2 (aq) + Ba(OH) 2 (aq) โ Ba(ClO 2 ) 2 (aq) + 2H 2 O( l ) d. (^) H+(aq) + OH-(aq) โ H 2 O( l ) e. 2HClO 2 (aq) + OH-(aq) โ 2ClO 2 - (aq) + 2H 2 O( l )
____ 28. Classify the following reaction by giving the reaction type that applies.
2HI(aq) + Ba(OH) 2 (aq) โ 2H 2 O(l) + BaI 2 (aq)
a. redox b. combination c. Decomposition d. displacement e. metathesis
