Chemical Reactions-Multiple Choice Review
Chemical Reactions-Multiple Choice ReviewPSI ChemistryName1) What are the missing coefficients for the skeleton equation below?Al2(SO4)3(aq) KOH(aq) Al(OH)3(aq) K2SO4(aq)A) 1,3,2,3B) 2,12,4,6C) 4,6,2,3D) 1,6,2,3E) 2,3,1,12) What are the missing coefficients for the skeleton equation below?Cr(s) Fe(NO3)2(aq) Fe(s) Cr(NO3)3(aq)A) 4,6,6,2B) 2,3,2,3C) 2,3,3,2D) 1,3,3,1E) 2,3,1,23) What are the missing coefficients for the skeleton equation below?NH3 (g) O2(g) N2(g) H2O(l)A) 4,3,2,6B) 2,1,2,3C) 1,3,1,3D) 2,3,2,3E) 3,4,6,24) If you rewrite the following word equation as a balanced chemical equation, what will thecoefficient and symbol for iodine be?bromine potassium iodide potassium bromide iodineA) 2IB) IC) 2ID) I2E) 2I25) If you rewrite the following word equation as a balanced chemical equation, what will thecoefficient and symbol for fluorine be?nitrogen trifluoride nitrogen fluorineA) 3FB) 6F2C) F3D) 6FE) 3F2www.njctl.orgChemistryChemical Reactions
6) What are the missing coefficients for the skeleton equation below?AlCl3 NaOH Al(OH)3 NaClA) 1,3,1,3B) 3,1,3,1C) 1,1,1,3D) 1,3,3,1E) 3,1,1,17) What are the missing coefficients for the skeleton equation below?N2 H2 NH3A) 1,1,2B) 1,3,3C) 3,1,2D) 1,3,2E) 2,6,68) Aluminum chloride and bubbles of hydrogen gas are produced when metallic aluminum isplaced in hydrochloric acid. What is the balanced equation for this reaction?A) H AlCl Al HClB) 2Al 6HCl 2AlCl3 3H2C) Al HCl3 AlCl3 HD) Al 2HCl AlCl2 H2E) H2 AlCl3 Al 2HCl9) What does the symbol Δ in a chemical equation mean?A) heat is supplied to the reactionB) a catalyst is neededC) yieldsD) precipitate10) When the equation, Fe Cl2 FeCl3, is balanced, what is the coefficient for Cl2?A) 1B) 2C) 3D) 411) When the following equation is balanced, what is the coefficient for HCl?Mg(s) HCl(aq) MgCl2 (aq) H2(g)A) 6B) 3C) 1D) 2www.njctl.orgChemistryChemical Reactions
12) Chemical reactions .]A) occur only in living organismsB) create and destroy atomsC) only occur outside living organismsD) produce new substances13) Which of the following is NOT a true statement concerning what happens in all chemicalreactions?A) The ways in which atoms are joined together are changed.B) New atoms are formed as products.C) The starting materials are named reactants.D) The bonds of the reactants are broken and new bonds of the products are formed.E) In a word equation representing a chemical reaction, the reactants are written on the leftand the products on the right.14) Chemical equations .A) describe chemical reactionsB) show how to write chemical formulasC) give directions for naming chemical compoundsD) describe only biological changes15) A skeleton equation does NOT show which of the following?A) the correct formulas of the reactants and productsB) the reactants on the left, the products on the rightC) an arrow connecting the reactants to the productsD) the physical states of the substancesE) the relative amounts of reactants and products16) Chemical equations describe . A) nuclear reactionsB) electrochemical processesC) chemical reactionsD) biological reactionsE) all the above17) Chemical equations must be balanced to satisfy the . A) law of definite proportionsB) law of multiple proportionsC) law of conservation of massD) principle of Avogadrowww.njctl.orgChemistryChemical Reactions
18) Symbols used in equations, together with the explanations of the symbols, are shownbelow. Which set is correct?A) (g), gramsB) (l), litersC) (aq), dissolved in waterD) (sp), solid productE) (lq), liquid19) In the chemical equation, H2O2(aq) H2O(l) O2(g), the H2O2 is a .A) productB) reactantC) catalystD) solidE) gas20) A catalyst is . A) the product of a reactionB) is a reactantC) one of the reactants in single-replacement reactionsD) a solid product of a reactionE) a chemical that speeds up the reaction21) When the following equation is balanced, KClO3 (s) KCl(s) O2(g), the coefficient ofKClO3 is .A) 1B) 2C) 3D) 4E) 622) Which of the following is the correct skeleton equation for the reaction that takes placewhen solid phosphorus combines with oxygen gas to form diphosphorus pentoxide?A) P(s) O2 (g) PO2 (g)B) P(s) O(g) P2O5 (g)C) P(s) O2 (g) P2O5(g)D) P2O5 P2 (s) O2 (g)E) P2(s) O5 (g) P2O5 (g)23) In every balanced chemical equation, each side of the equation has the same number of.A) atomsB) moleculesC) moleswww.njctl.orgChemistryChemical Reactions
D) coefficientsE) subscripts24) When potassium hydroxide and barium chloride react, potassium chloride and bariumhydroxide are formed. The balanced equation for this reaction is .A) KH BaCl KCl BaHB) KOH BaCl KCl BaOHC) 2KOH BaCl2 2KCl Ba(OH)2D) KOH BaCl2 K BaOHE) 2KOH 2BaCl2 2KCl2 2Ba(OH)225) The double arrow symbol indicates .A) that heat must be appliedB) an incomplete combustion reactionC) that a gas is formed by the reactionD) that the reaction is reversible26) If a combination reaction takes place between potassium and chlorine, what is theproduct?A) KClB) KCl2C) K2ClD) PClE) PCl227) The product of a combination reaction is Ba(OH)2. If one reactant was H2O what was theother reactant? A) Ba2OB) BaOC) BaHD) BaO2E) Ba2O728) Write a balanced equation for the combination reaction that takes place when iron(III)oxide is formed from its constituent elements.A) Fe2 O3 Fe2O3B) 2Fe 3O Fe2O3C) 4Fe 3O2 2Fe2O3D) 3Fe O Fe3OE) Fe O3 FeO3www.njctl.orgChemistryChemical Reactions
29) The reaction, 2Fe 3Cl2 2FeCl3, is an example of which type of reaction?A) REDOX - combustion reactionB) REDOX - disproportionation reactionC) REDOX - combination reactionD) Precipitation ReactionE) Acid/Base Reaction30) Write a balanced equation to represent the decomposition of lead(IV) oxide into it’sconstiutent elements.A) PbO2 Pb 2OB) PbO2 Pb O2C) Pb2O 2Pb OD) PbO Pb O2E) 2PbO 2Pb O231) What is the balanced equation for the reaction that takes place between bromine andsodium iodide?A) Br2 NaI NaBr2 IB) Br2 2NaI 2NaBr I2C) Br2 2NaI 2NaBr 2ID) Br NaI2 NaBrI2E) Br NaI2 NaBr I232) The equation Mg(s) 2HCl(aq) MgCl2(aq) H2 is an example of which type ofreaction? A) REDOX reactionB) Acid/Base reactionC) REDOX - disproportionation reactionD) Precipitation reaction33) What are the correct formulas and coefficients for the products of this acid/baseneutralization reaction? RbOH H3PO4 A) Rb(PO4)3 H2OB) RbPO4 2H2OC) Rb3PO4 3H2OD) H3Rb PO4OHE) 3RbH H2OPO434) The equation H3PO4 3KOH K3PO4 3H2O is an example of which type of reaction? A) REDOX - combination reactionB) REDOX - disproportionation reactionwww.njctl.orgChemistryChemical Reactions
C) Acid/Base reactionD) Precipitation reaction35) When the equation for the complete combustion of ethanol, C2H5OH, is balanced, what isthe coefficient for oxygen? A) 1B) 3C) 6D) 7E) 1436) The equation 2C3H7OH 9O2 6CO2 8H2O is an example of which type of reaction?A) REDOX - combustionB) REDOX - synthesisC) Acid/base reactionD) Precipitation reaction37) Which of the following is NOT true concerning the decomposition of a simple binarycompound? A) The products are unpredictable.B) The products are the constituent elements.C) The reactant is a single substance.D) The reactant could be an ionic or a molecular compound.E) Energy is usually required.38) Which of the following is TRUE regarding a precipitation reaction.A) Both products must be soluble in waterB) At least one of the products will be insoluble in waterC) Spectator ions are always included in the reactionD) Electrons are gained and lostE) H ions are transferred from one molecule to another39) Which of the following ions will NEVER form a precipitate?A) K B) Ca2 C) CO32D) SO42E) Pb2 40) Combining aqueous solutions of BaI2 and Na2SO4 affords a precipitate of BaSO4. Whichion(s) is/are spectator ions in the reaction? A) Ba2 onlywww.njctl.orgChemistryChemical Reactions
B) Na onlyC) Ba2 and SO42D) Na and IE) SO42- and I41) Which ion(s) is/are spectator ions in the formation of a precipitate of AgCl via combiningaqueous solutions of CoCl2 and AgNO3? A) Co2 and NO3B) NO3- and ClC) Co2 and Ag D) ClE) NO342) The balanced net ionic equation for precipitation of CaCO 3 when aqueous solutions ofNa2CO3 and and CaCl2 are mixed is . A) 2Na (aq) CO32-(aq) Na2CO3(aq)B) 2Na (aq) 2Cl-(aq) 2NaCl(aq)C) Na (aq) Cl-(aq) NaCl(aq)D) Ca2 (aq) CO32-(aq) CaCO3(s)E) Na2CO3(aq) CaCl2(aq) 2NaCl(aq) CaCO3(s)43) When aqueous solutions of AgNO3 and KI are mixed, AgI precipitates. The balanced netionic equation is: A) Ag (aq) I-(aq) AgI(s)B) Ag (aq) NO3-(aq) Ag NO3(s)C) Ag (aq) NO3-(aq) Ag NO3(aq)D) Ag NO3(aq) KI(aq) AgI(s) KNO3(aq)E) Ag NO3(aq) KI(aq) AgI(aq) KNO3(s)44) A precipitation reaction takes place when aqueous cobalt(III) chloride reacts with aqueouslithium hydroxide. One of the products of this reaction would be . A) Co(OH)3 (s)B) Co(OH)2 (s)C) LiCO3 (s)D) LiCl3 (aq)E) Cl3OH (s)45) What is the driving force in the following reaction?Ni(NO3)2(aq) K2S(aq) NiS 2KNO3(aq)A) A gas is formed.B) A precipitate is formed.C) Ionic compounds are reactants.D) Ionic compounds are products.E) Heat is required.46) A precipitation reaction takes place when aqueous Na2CO3 reacts with aqueous Sn(NO3)2.You would expect one of the products of this reaction to be .www.njctl.orgChemistryChemical Reactions
A) NaNO3 (aq)B) NaSn (s)C) Sn(CO3)2 (s)D) CNO347)Which of the following solutions, when added to a solution of Na2SO4 would form aprecipitate?I.AgNO3(aq)II.KNO3(aq)III.CaCl2 (aq)A) I onlyB) II onlyC) III onlyD) I and II onlyE) I and III only48)Which of the following solutions, when added to a solution of Sr(NO 3)2(aq), would form aprecipitate?I.Na2SO4 (aq)II.HgC2H3O2(aq)III.NH4ClA) I onlyB) II onlyC) III onlyD) I and II onlyE) I, II, and III49)Which of the following represents the correct net-ionic equation for the reaction of calciumnitrate with potassium phosphate?A) Ca2 (aq) PO43- (aq) -- CaPO4(s)B) 2Ca2 (aq) 3PO43- (aq) -- Ca2(PO4)3(s)C) 3Ca2 (aq) 2PO43-(aq) -- Ca3(PO4)2(s)D) K (aq) NO3-(aq) -- KNO3(s)E) 2NO3-(aq) Ca2 -- Ca(NO3)2(s)50)Which of the following is/are TRUE regarding oxidation/reduction reactions?I. Oxidation involves the gain of electronsII.electrons are transferred from one substance to anotherIII.The number of electrons lost/gained must be equalA. I onlyB. II onlyC. III onlyD. II and IIIE. I, II, and IIIwww.njctl.orgChemistryChemical Reactions
51) What would be the correct oxidation state of N in the nitrite ion (NO 2-)?A. 1B. 3C. 5D. -3E. -152) What would be the correct oxidation state of N and O respectively in KNO3?A. 1 and -2B. 3 and -2C. 5 and -2D. 5 and -1E. -3 and -253. Which of the following compounds contain a Cl atom with a 7 oxidation state?A. Cl2B. HOClC. ClO3D. KClE. KClO454. In the following reaction, 2Al 6HCl 2AlCl3 3H2 , the oxidation state for aluminumgoes from.A) 0 -- 1B) 0 -- 3C) 3 -- 3D) 3 -- -3E) 0 -- -355. In which of the following compounds would hydrogen have an oxidation state of zero?A) HIB) NaHC) Ca(OH)2D) NH4ClE) H256. Which of the following represents an oxidation?A. Na -- NaB. N2 -- 2N3C. Mn7 -- Mn2 D. Fe -- Fe3 E. None of these are oxidations57. In which of the following reactions does hydrogen get reduced?A. 2H2 O2 -- 2H2OB. Cl2 H2 -- 2HClwww.njctl.orgChemistryChemical Reactions
C. 2NaH 2H2O -- 2NaOH 3H22 HD. Mg 2H -- Mg2E. H never gets reduced58. In a combustion reaction, one of the reactants is .A) hydrogenB) nitrogenC) oxygenD) a metalE) a binary ionic compound59) The products of a combustion reaction do NOT include . A) waterB) carbon dioxideC) carbon monoxideD) heatE) hydrogen60) The complete combustion of which of the following substances produces carbon dioxideand water? A) C8H18B) K2CO3C) CaHCO3D) NOE) H2S61) Which of the following is the correctly balanced equation for the incomplete combustion ofheptene, C7H14?A) C7H14 14O 7CO 7H2OB) C7H14 7O2 7CO 7H2OC) 2C7H14 21O2 14CO2 14H2OD) C7H14 O2 C7O2 7H2E) C7H14 7O2 7CO2 7H2O62)Which of the following is TRUE regarding the following reaction?F2(g) 2I-(aq) -- I2(s) 2F-(aq)I.II.III.Flourine gets oxidizedIodide ions lose electronsIt is a disproportionation reactionA) I onlyB) II onlywww.njctl.orgChemistryChemical Reactions
C) III onlyD) I and III onlyE) I, II, and III63)Which of the following would NOT be an oxidation/reduction reaction?A. Na(s) I2(s) -- 2NaIB. Ca2 (aq) CO32-(aq) -- CaCO3(s)C. 2HgO (s) -- 2Hg (s) O2(g)D. Fe2 (aq) H (aq) CrO42-(aq) -- Fe 3(aq) H2O(l) Cr3 (aq)E. 2Fe2O3(s) -- 4Fe(s) 3O2(g)64) What would be the products of the acid/base reaction between KOH (aq) and HNO 3 (aq)?A) K and H B) H and OHC) K and NO3D) H2O K NO3E) OH- only65) The net ionic equation for the reaction between aqueous solutions of HF and KOH is. (Assume HF does not dissociate)A) HF KOH H2O K FB) HF OH- H2O FC) HF K OH- H2O KFD) H OH- H2OE) H F- K OH- H2O K F-66) When H2SO4 is neutralized by NaOH in aqueous solution, the net ionic equation is. (Assume H2SO4 dissociates)A) SO42-(aq) 2Na (aq) Na2SO4(aq)B) SO42-(aq) 2Na (aq) Na2SO4(s)C) H (aq) OH-(aq) H2O(l)D) H2SO4(aq) 2OH-(aq) 2H2O(l) SO42-(aq)E) 2H (aq) 2NaOH(aq) 2H2O(l) 2Na (aq)67)Which of the following would be TRUE regarding acid/base reactions?I.Acids donate electronsII.Bases accept H ionsIII.In a neutralization reaction, H2O is a productA) I onlyB) II onlyC) III onlyD) I and IIIE) II and IIIwww.njctl.orgChemistryChemical Reactions
68)Which of the following would be a disproportionation reaction?A) Fe2 (aq) -- Fe3 (aq) Fe(s)B) 2Cl- (aq) Pb2 (aq) -- PbCl2(s)C) PCl5(g) -- PCl3(g) Cl2(g)D) HCN(aq) OH-(aq) -- H2O(l) CN-(aq)E) None of theseFor the following, indicate if the first statement is true or false, if the second statement is true orfalse, and then if the second statement is an explanation of the first. These questions aredesigned to mimic a type of question found on the SAT II chemistry exam.69. Acids donate H ionsBECAUSE70.Spectators ionsare not included in a reaction BECAUSE71. Iron gets oxidized in the reaction BECAUSEFe(s) -- Fe3 (aq)Bases accept H ionsspectator ions are typically insolubleFe lost electronsAnswers:www.njctl.orgChemistryChemical Reactions
1) D2) C3) A4) D5) E6) A7) D8) B9) A10) C11) D12) D13) B14) A15) E16) E17) C18) C19) B20) E21) B22) C23) A24) C25) D26) A27) B28) C29) C30) Bwww.njctl.org31) B32) A33) C34) C35) D36) A37) A38) B39) A40) D41) A42) D43) A44) A45) B46) A47) E48) A49) C50) D51) B52) C53) E54) B55) E56) D57) D58) C59) E60) A61) B62) BChemistryChemical Reactions
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B) New atoms are formed as products. C) The starting materials are named reactants. D) The bonds of the reactants are broken and new bonds of the products are formed. E) In a word equation representing a chemical reaction, the reactants are written on the left and the products on the right. 14) Chemical equations _. A) describe chemical .
Chemical Reactions Slide 3 / 142 Table of Contents: Chemical Reactions · Balancing Equations Click on the topic to go to that section · Types of Chemical Reactions · Oxidation-Reduction Reactions · Chemical Equations · Net Ionic Equations · Types of Oxidation-Reduction Reactions · Acid-Base Reactions · Precipitation Reactions
Lesson Overview Chemical Reactions and Enzymes Chemical Reactions and Enzymes. Lesson Overview Chemical Reactions and Enzymes Chemical Reactions A chemical reaction is a process that changes , or transforms, one set of chemicals into another by changing the
Chemical reactions called _ reactions give off heat. 5. Other reactions called _ reactions absorb heat and cool the immediate environment. 6. True or False. During all chemical reactions, a chemical change takes place that produces new substances with properties different than those of the original substances. .
The Major Classes of Chemical Reactions. 4.6 Elements in Redox Reactions 4.1 The Role of Water as a Solvent 4.2 Writing Equations for Aqueous Ionic Reactions 4.3 Precipitation Reactions 4.4 Acid -Base Reactions. 4.5 Oxidation -Reduction (Redox) Reactions 4.7
Types of Reactions There are five main types of chemical reactions we will talk about: 1. Synthesis reactions 2. Decomposition reactions 3. Single displacement reactions 4. Double displacement reactions 5. Comb
ii. acid–base neutralization reactions iii. oxidation–reduction or redox reactions. Q.3. What are the important aspects of redox reactions? Ans: Almost every element participate in redox reactions. The important aspects of redox reactions are as follows: i. Large number of natural, biological and industrial processes involve redox reactions .
C.P. Chemistry Test Unit 8 Study Guide Chemical Equations and Reactions Recognize evidence of chemical change. Identify the reactants and products in a chemical reaction. Represent chemical reactions with equations. Know what is represented by the symbols: s, l, g, and aq. Categorize chemical reactions by type (synthesis/combination, decomposition,
Topic 8: Chemical Reactions Chemical Equations & Reactions (Chapter 8 in Modern Chemistry) Describing Chemical Reactions A chemical reaction is the process by which one or more substances are changed into one or more different substances. In any chemical reaction, the original substances are known as the
