Pretest - Chemical Reactions

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| By Kyle Pearson
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Kyle Pearson
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Quizzes Created: 34 | Total Attempts: 99,494
Questions: 11 | Attempts: 3,483

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Pretest - Chemical Reactions - Quiz

Needed SKILLS: Can you classify reactions, balance equations, and predict products?


Questions and Answers
  • 1. 

    Classify the chemical reaction:  MgCl2  +  Li2CO3  >>>  MgCO3  +  LiCl

    • A.

      Sythesis

    • B.

      Decomposition

    • C.

      Combustion

    • D.

      Single displacement

    • E.

      Double displacement

    • F.

      Acid base or neutralization reaction

    Correct Answer
    E. Double displacement
    Explanation
    All compounds in the reaction means DOUBLE DISPLACEMENT

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  • 2. 

    Classify the chemical reaction:  P4  +  3 O2  >>> 2 P2O3

    • A.

      Sythesis

    • B.

      Decomposition

    • C.

      Combustion

    • D.

      Single disreplacement

    • E.

      Double replacement

    • F.

      Acid / base reaction

    Correct Answer
    A. Sythesis
    Explanation
    One product = SYNTHESIS REACTION

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  • 3. 

    Classify the chemical reaction:   C6H12  +  9 O2  >>> 6 CO2  +  6 H2O

    • A.

      Sythesis

    • B.

      Decomposition

    • C.

      Combustion

    • D.

      Single displacement

    • E.

      Double displacement

    • F.

      Acid base or neutralization reaction

    Correct Answer
    C. Combustion
    Explanation
    O2 is a reactant and CO2 and H20 are products = COMBUSTION REACTION

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  • 4. 

    Classify the chemical reaction:   Pb  +  FeSO4  >>>  PbSO4  +  Fe

    • A.

      Sythesis

    • B.

      Decomposition

    • C.

      Combustion

    • D.

      Single displacement

    • E.

      Double displacement

    • F.

      Acid base or neutralization reaction

    Correct Answer
    D. Single displacement
    Explanation
    If you have an element and compound on both sides = SINGLE DISPLACEMENT

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  • 5. 

    Classify the chemical reaction:   CaCO3   >>>  CaO  +  CO2

    • A.

      Sythesis

    • B.

      Decomposition

    • C.

      Combustion

    • D.

      Single displacement

    • E.

      Double displacement

    • F.

      Acid base or neutralization reaction

    Correct Answer
    B. Decomposition
    Explanation
    One reactant = DECOMPOSITION REACTION

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  • 6. 

    Classify the chemical reaction:   C4H8  +    O2  >>>  CO2  +  6 H2O

    • A.

      Sythesis

    • B.

      Decomposition

    • C.

      Combustion

    • D.

      Single displacement

    • E.

      Double displacement

    • F.

      Acid base or neutralization reaction

    Correct Answer
    C. Combustion
    Explanation
    O2 is a reactant and CO2 and H20 are products = COMBUSTION REACTION

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  • 7. 

    Classify the chemical reaction:   KOH  +  H2SO4  >>>  K2SO4  +  H2O

    • A.

      Sythesis

    • B.

      Decomposition

    • C.

      Combustion

    • D.

      Single displacement

    • E.

      Double displacement

    • F.

      Acid base or neutralization reaction

    Correct Answer
    F. Acid base or neutralization reaction
    Explanation
    Base (KOH) + acid (H2SO4) = acid base reaction

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  • 8. 

    Predict the products:  AlCl3  +  Cs  >>>  

    • A.

      K2SO4 + H2O

    • B.

      AlCs + Cl

    • C.

      Al + ClCs

    • D.

      CsCl + Al

    • E.

      Double displacement

    • F.

      Acid base or neutralization reaction

    Correct Answer
    D. CsCl + Al
    Explanation
    element + compound reactants tells you it is going to be a Single Displacement. Switch the cations

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  • 9. 

    Predict the products:   CH4  +  O2  >>>

    • A.

      CH4 + O2

    • B.

      O2 + H4C

    • C.

      H2O + CO2

    • D.

      H4O + CH

    Correct Answer
    C. H2O + CO2
    Explanation
    Carbon compound and oxygen = COMBUSTION REACTION. Products are water and carbon dioxide

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  • 10. 

    Where do you find the reactants and products in a chemical reaction

    • A.

      Reactants >>> products

    • B.

      Products >>> reactants

    • C.

      Didn't learn that

    • D.

      Don't know

    Correct Answer
    A. Reactants >>> products
    Explanation
    Reactants are on the left side of arrow and Products are on the right side of arrow

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  • 11. 

    ONLY Place the coefficient in your answer___ P     + ____ O2   ➥ ____ P2O5

    Correct Answer
    4 - 5 - 2
    Explanation
    The given equation represents the balanced chemical equation for the reaction between P and O2 to form P2O5. The coefficients in front of the chemical formulas represent the number of moles of each substance involved in the reaction. In this case, the coefficient for P is 4, indicating that 4 moles of P react. The coefficient for O2 is 5, indicating that 5 moles of O2 react. Finally, the coefficient for P2O5 is 2, indicating that 2 moles of P2O5 are formed.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 08, 2015
    Quiz Created by
    Kyle Pearson
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