Chemistry Se 11 B

6 Questions | Total Attempts: 121

SettingsSettingsSettings
Please wait...
Chemistry Quizzes & Trivia

Questions and Answers
  • 1. 
    During an endothermic reaction, heat content in the surroundings decreases because —
    • A. 

      The reaction absorbs heat energy

    • B. 

      All reactions need heat energy

    • C. 

      Energy is given off by the reaction

    • D. 

      Heat energy is destroyed during reactions

  • 2. 
    Which of the following equations correctly shows that the combustion of methane is an exothermic reaction?
    • A. 

      CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

    • B. 

      Heat + CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

    • C. 

      CH4(g)+2O2(g)+heat→CO2(g)+2H2O(g)

    • D. 

      CH4(g)+2O2(g)→CO2(g)+2H2O(g)+heat

  • 3. 
    Photosynthesis, the reaction plants use to make sugar, is an endothermic reaction. Which best describes the energy of the products and reactants in the photosynthesis reaction?
    • A. 

      Energy is absorbed during the reaction, making the energy of the products greater than the energy of the reactants.

    • B. 

      Energy is given off during the reaction, making the energy of the products greater than the energy of the reactants.

    • C. 

      Energy is absorbed during the reaction, making the energy of the reactants greater than the energy of the products.

    • D. 

      Energy is given off during the reaction, making the energy of the reactants greater than the energy of the products.

  • 4. 
    Which of the following causes a change in state from liquid to gas?
    • A. 

      High kinetic energy

    • B. 

      A chemical reaction

    • C. 

      Hydrogen bonding

    • D. 

      Temperature at freezing point

  • 5. 
    What process takes place when the average energy of a gas’s particles decreases?
    • A. 

      Condensation

    • B. 

      Vaporization

    • C. 

      Boiling

    • D. 

      Melting

  • 6. 
    ∆EUniverse = ∆ESystem + ∆ESurroundings = 0  
    • A. 

      Conservation of energy.

    • B. 

      Conservation of mass.

    • C. 

      Definite composition.

    • D. 

      Multiple proportions.

Back to Top Back to top