Have an account?
Skip to Content
Build your own quiz
28 questions
Show Answers
See Preview
- 1. Multiple ChoiceWhat is the balanced equation when aluminum reacts with copper(II) sulfate?Al + CuSO4 --> AlSO4 + Cu2Al + 3CuSO4 --> Al2(SO4)3 + 3CuAl + Cu2S --> Al2S + Cu2Al + Cu2SO4 --> Al2SO4 + 2Cu
- 2. Multiple ChoiceZn (s) + 2HCl --> ZnCl2 + H2
Choose the following statement that best explains why this chemical reaction is an oxidation-reduction reaction:Zn and H+ undergo a change of state.Zn loses electrons and H+ gains electrons.Zn reacts under basic conditions.Zn dissolves in an aqueous solution. - 3. Multiple ChoiceIn the chemical reaction,
2H2 + O2 --> 2H2O, the reactant(s) is or are:H2H2OO2H2 and O2 - 4. Multiple ChoiceWhen the equation Fe3O4 + Al --> Al2O3 + Fe is correctly balanced, what is the coefficient of Fe?2794
- 5. Multiple ChoiceCompare the elements in the reaction below as they change from reactants to products. Which answer choice correctly lists the change in oxidation number for Fe in the reaction below?
2 Fe2O3 --> 4 Fe + 3 O2+2 to +4+3 to 0+3 to –20 to +3 - 6. Multiple ChoiceThe reaction Ca(s) + 2HCl(aq) -> H2(g) + CaCl2(aq) is aSingle ReplacementDouble ReplacementDecompositionSynthesis
- 7. Multiple ChoiceGiven the balanced equations representing two chemical reactions:
1. I2 + 2 KBr --> 2ICl + Br2
2. 2NaCl --> 2 Na + Cl2
Which types of chemical reactions are represented by these equations?single replacement and double replacementsynthesis and double replacementsynthesis and decompositionsingle replacement and decomposition - 8. Multiple ChoiceWhich equation represents a decomposition reaction?Cu + 2AgNO3 --> 2Ag + Cu(NO3)2CaCO3 --> CaO + CO2KOH + HCl --> KCl + H2O2H2 + O2 --> 2H2O
- 9. Multiple ChoiceThe reaction 2KClO3(s) --> 2KCl(s) + 3O2(g) is a(n)DecompositionSynthesisSingle ReplacementDouble Replacement
- 10. Multiple ChoiceWhich type of reaction is the following?
3C3H7OH + 9O2 --> 6CO2 + 8H2ODouble ReplacementDecompositionCombustionSingle Replacement - 11. Multiple ChoiceSolid NaCl is produced by the reaction of metallic sodium with chlorine gas. This reaction is also accompanied by the release of heat energy. Which equation shows this reaction?2Na (s) + Cl2 (g) -->2NaCl (s) + heatNa+ (aq) + Cl– (aq) --> NaCl (s) + heat2NaCl (s) --> 2Na (s) + Cl2 (g) + heatNaCl (s) + heat --> Na+ (aq) + Cl– (aq)
- 12. Multiple ChoiceIn writing an equation that produces oxygen gas, the correct representation of oxygen gas isOH2OO2O
- 13. Multiple ChoiceAfter the correct formulas for a reactants and products in an equation has been written, thethe formula can be changedcoefficients are adjusted to balance the equationsame formula must appear as the productsymbols in the formula must not appear on the product side of the equation
- 14. Multiple ChoiceMagnesium reacts with hydrochloric acid to yield magnesium chloride andHydrogen gasSodiumOxygen gasChlorine gas
- 15. Multiple ChoiceWhich of the following is a formula equation for the formation of carbon dioxide from carbon and oxygen?C + O2 --> CO22C + O --> CO2Carbon plus oxygen yields carbon dioxide.CO2 --> C + O2
- 16. Multiple ChoiceAccording to the law of conservation of mass, the total mass of the reacting substances isalways less than the total mass of the products.always equal to the total mass of the products.sometimes more and sometimes less than the total mass of the products.always more than the total mass of the products.
- 17. Multiple ChoiceWhich coefficients correctly balance the equation C8H18 + O2 --> CO2 + H2O2, 25, 16, 181, 12, 8, 92, 17, 16, 181, 1, 1, 1
- 18. Multiple ChoiceWhich equation is NOT balanced?H2 + H2 + O2 --> H2O + H2O2H2 + O2 --> 2H2O4H2 + 2O2 --> 4H2O2H2 + O2 --> H2O
- 19. Multiple ChoiceA chemical formula written over the arrow in a chemical equation signifiesa catalyst for the reaction.a byproduct.an impurity.the formation of a gas.
- 20. Multiple ChoiceThe reaction Pb(NO3)2(aq) + 2KI(aq) --> PbI2(s) + 2KNO3(aq) is aDecomposition ReactionDouble Replacement ReactionSynthesis ReactionCombustion Reaction
- 21. Multiple Choice
According to the law of conservation of mass, how much zinc was present in the zinc carbonate?88g40g256g104g - 22. Multiple ChoiceThe reaction
2Mg(s) + O2(g) --> 2MgO(s)
is a:Double Replacement ReactionSynthesis ReactionSingle Replacement ReactionDecomposition Reaction - 23. Multiple ChoiceWhat symbol demonstrates a gas is formed and released?(aq)(l)î↔
- 24. Multiple ChoicePredict the products for the following reaction and determine the correct type of reaction:
Na2S + AgNO3 →Na2NO3 and Ag2S, CombustionAg2S and NaNO3, Single ReplacementNaAg and SNO3, SynthesisAg2S and NaNO3, Double Replacement - 25. Multiple ChoiceChoose the correct product with the correct type of reaction?
2C2H2(g) + 5O2(g) → 4CO2(g) + ______CH4 (g) Double replacement2H2O (g), CombustionH2 (g), Single replacement4H2O (aq), Combustion - 26. Multiple ChoiceWhich coefficients correctly balance the equation Fe(OH)3 --> Fe2O3 + H2O ?2, 2, 22, 1, 33, 4, 11, 1, 1
- 27. Multiple ChoiceCopper (Cu) and sulfur (S) were heated in a covered container. After the reaction was complete, the unreacted sulfur was removed. The table contains the results of the investigation. How much sulfur, in grams, failed to react with the copper?1.85g1.32g1.61g.24g
- 28. Multiple ChoiceWhen an insoluble solid compound is produced in a double-replacement reaction, acombustion reaction takes place.halogen is produced.precipitate is formed.gas bubbles off
- Answer choicesTagsAnswer choicesTags