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HEAT OF REACTION MCQs

Total Questions : 26 | Page 2 of 3 pages
Question 11. The chemical reaction in which heat is noted on the reactant’s side is …………………………
  1.    endothermic
  2.    Exothermic
  3.    Both A & B
  4.    None of these
 Discuss Question
Answer: Option A. -> endothermic
Question 12. In a chemical reaction, energy is used to :
  1.    cause a change of state
  2.    overcome intermolecular forces
  3.    break or form bonds within molecules
  4.    All of above
 Discuss Question
Answer: Option D. -> All of above
Question 13. How much heat is required to vaporize 150
  1.    62.7 kJ
  2.    50.1 kJ
  3.    150. kJ
  4.    339 kJ
 Discuss Question
Answer: Option D. -> 339 kJ
Question 14. What is latent heat?
  1.    heat that cause a temperature increase
  2.    heat that causes a temperature decrease
  3.    heat used/released in a phase change
  4.    large heat
 Discuss Question
Answer: Option C. -> heat used/released in a phase change
Question 15. How much heat is required to melt 26
  1.    5.88 x 104 kJ
  2.    8.68 kJ
  3.    109 J
  4.    0 kJ
 Discuss Question
Answer: Option B. -> 8.68 kJ
Question 16. The amount of heat required to raise the temperature of one gram of a substance by one degree Celsius is ________
  1.    Heat energy
  2.    Specific heat
  3.    convection
  4.    thermal energy
 Discuss Question
Answer: Option B. -> Specific heat
Question 17. The following information shows the results of an experiment to determine the heat change for the combustion of propanol, C3H7OH
  1.    34.65 kJ
  2.    51.66 kJ
  3.    86.3 kJ
  4.    120.96 kJ
 Discuss Question
Answer: Option B. -> 51.66 kJ
Question 18. Calorimetry Question:A piece of metal with a mass of 82
  1.    Iron
  2.    Copper
  3.    Gold
  4.    Titanium
 Discuss Question
Answer: Option D. -> Titanium
Question 19. Which of the following is an endothermic reaction?
  1.    HCI + NaOH → NaCl + H2O
  2.    HCI + NaHCO3 → NaCl + CO2 + H2O
  3.    NaCl + AgNO3 → AgCl + NaNO3
  4.    Zn + CuSO4 → ZnSO4 + Cu
 Discuss Question
Answer: Option B. -> HCI + NaHCO3 → NaCl + CO2 + H2O
Question 20. Which process absorbs energy?
  1.    Evaporation
  2.    Combustion
  3.    Neutralisation
  4.    Displacement
 Discuss Question
Answer: Option A. -> Evaporation

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