Chemical Equations And Reactions

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| By Stephanie Earhart
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Stephanie Earhart
Community Contributor
Quizzes Created: 1 | Total Attempts: 409
| Attempts: 409
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  • 1/16 Questions

    Which of the following reactions involves the ions of two compounds exchanging places to form two new compounds?

    • Synthesis reaction
    • Single-replacement reaction
    • Double-replacement reaction
    • Combustion reaction
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About This Quiz

This quiz is a review for the unit exam. If you do well on this, you will pass the exam.

Chemical Reactions Quizzes & Trivia

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  • 2. 

    According to the law of conservation of matter, the total mass of all the reacting substances is -

    • More than the mass of all the products

    • More than the total mass of all the products and reactants

    • Less than the total mass of all the products

    • Equal to the mass of all the products

    Correct Answer
    A. Equal to the mass of all the products
    Explanation
    Matter cannot be created or destroyed, it is conserved.

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  • 3. 

    Which of the following reactions involves one element replacing an element in a compound that is from the same activity series?

    • Combustion reaction

    • Decomposition reaction

    • Single-replacement reaction

    • Double-replacement reaction

    Correct Answer
    A. Single-replacement reaction
    Explanation
    If only one element is being replaced, it is a single-replacement reaction.

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  • 4. 

    Which of the following reactions involves a single compound producing two or more simpler substances?

    • Synthesis reaction

    • Decomposition reaction

    • Combustion reaction

    • Double-replacement reaction

    Correct Answer
    A. Decomposition reaction
    Explanation
    When you have a single substance breaking down into simpler substances, it is decomposing.

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  • 5. 
    Which equation represents a precipitation reaction? - ProProfs

    Which equation represents a precipitation reaction?

    • Equation A

    • Equation B

    • Equation C

    • Equation D

    Correct Answer
    A. Equation D
    Explanation
    A precipitation reaction is one that produces a solid. Look at the symbols for the products.

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  • 6. 

    Which of the following reactions involves two or more substances combining to form a new compound?

    • Single-replacement reaction

    • Synthesis reaction

    • Decomposition reaction

    • Combustion reaction

    Correct Answer
    A. Synthesis reaction
    Explanation
    The substances are combining to make something new. This is the definition of a synthesis reaction.

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  • 7. 

    What would you observe during a precipitation reaction?

    • Gas bubbles are produced.

    • A solid settles out.

    • There is a color change.

    • The test tube warms.

    Correct Answer
    A. A solid settles out.
    Explanation
    A precipitation reaction produces a solid.

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  • 8. 

    When an acid decomposes, what are the products?

    • Non-metal oxides and a salt

    • Non-metal oxides and water

    • Metal oxides and oxygen

    • Metal oxides and peroxide

    Correct Answer
    A. Non-metal oxides and water
    Explanation
    H2SO4 --> SO3 + H2O

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  • 9. 
    Predict the products of this reaction. - ProProfs

    Predict the products of this reaction.

    • Na2CO3

    • Na + CO3

    • NaCO2 + O2

    • NaC + O3

    Correct Answer
    A. Na2CO3
    Explanation
    Sodium is the only metal, so there is no single-replacement reaction. Think about a balanced equation.

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  • 10. 
    Which coefficients are required to correctly balance the equation? - ProProfs

    Which coefficients are required to correctly balance the equation?

    • 1,2,3,2

    • 2,5,4,2

    • 2,4,5,2

    • 2,3,5,2

    Correct Answer
    A. 2,5,4,2
    Explanation
    Make sure each type of atom is equal on both sides.

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  • 11. 

    Predict the outcome of the reaction where zinc metal is added to a solution of potassium chloride.

    • No reaction occurs

    • Gaseous zinc is formed

    • Potassium calcide forms

    • Zinc chloride forms

    Correct Answer
    A. No reaction occurs
    Explanation
    Zinc is below potassium in the Activity Series so it would not replace potassium.

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  • 12. 
    By predicting the outcome of the following reactants mixing together in an aqueous solution, what type of reaction will take place? - ProProfs

    By predicting the outcome of the following reactants mixing together in an aqueous solution, what type of reaction will take place?

    • Double-replacement reaction

    • Synthesis reaction

    • Decomposition reaction

    • Single-replacement

    Correct Answer
    A. Double-replacement reaction
    Explanation
    You can tell by looking at the reactants that this is set up as AX + BY --> . This indicates a double-replacement reaction.

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  • 13. 

    A student performing an investigation of chemical reactions mixes two aqueous solutions and observes a change in color. Color change is most indicative of which type of chemical reaction?

    • Neutralization

    • Precipitation

    • Oxidation-reduction

    • Acid-base

    Correct Answer
    A. Oxidation-reduction
    Explanation
    Neutralization and acid-base are pretty much the same thing. There may not be any color change with this reaction. A precipitation reaction will turn cloudy, but not necessarily a color change. A color change usually indicates an oxidation-reduction reaction. Think about a nail rusting.

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  • 14. 

    After the correct formula for a reactant in an equation has been written, the -

    • Chemical formula cannot be altered

    • Subscripts of the formula are changed to balance the equation

    • Chemical symbols in the formula must appear only on the reactant side

    • Same chemical formula must be written on the product side of the equation

    Correct Answer
    A. Chemical formula cannot be altered
    Explanation
    Remember that if you alter the chemical formula, you have changed the substance.

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  • 15. 
    Which equation represents a neutralization reaction? - ProProfs

    Which equation represents a neutralization reaction?

    • Equation A

    • Equation B

    • Equation C

    • Equation D

    Correct Answer
    A. Equation A
    Explanation
    A neutralization reaction involves and acid and a base.

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  • 16. 

    Write the balanced equation: Sodium hydroxide and chlorine gas yields sodium chloride, sodium hypochlorite, and water.

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  • Current Version
  • May 26, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 21, 2018
    Quiz Created by
    Stephanie Earhart
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