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MCQs

Total Questions : 368 | Page 32 of 37 pages
Question 311. What is the enthalpy of reaction for CO₂ + 4H₂ -> 2H₂O + CH₄, if the conversion of CO₂ is 50%, and heat of formation of CO₂, H₂, H₂O, and CH₄ are 6 J, 0, 4 J and 10 J?
  1.    2 J
  2.    5 J
  3.    6 J
  4.    9 J
 Discuss Question
Answer: Option D. -> 9 J
Answer: (d).9 J
Question 312. What is the enthalpy of reaction for CH₄ + 2O₂ -> CO₂ + 2H₂O, if the conversion of CH₄ is 50%, and heat of formation of CH₄, O₂, CO₂, and H₂O are 10 J, 0, 6 J and 4 J?
  1.    0
  2.    2 J
  3.    4 J
  4.    6 J
 Discuss Question
Answer: Option B. -> 2 J
Answer: (b).2 J
Question 313. What is the enthalpy of reaction for C₂H₄ + 3O₂ -> 2CO₂+ 2H₂O, if the conversion of CH₄ is 50%, and heat of formation of CH₄, O₂, CO₂, and H₂O are 10 J, 0, 6 J and 4 J?
  1.    0
  2.    2 J
  3.    5 J
  4.    10 J
 Discuss Question
Answer: Option D. -> 10 J
Answer: (d).10 J
Question 314. What is the enthalpy change of a reaction at 30°C, if the enthalpy of reactant at 30°C and 25°C are 18 J and 15 J, and enthalpy of product at 30°C and 25°C are 10 J and 8 J, and the enthalpy change of reaction at 25°C is 45 J?
  1.    10 J
  2.    25 J
  3.    50 J
  4.    100 J
 Discuss Question
Answer: Option C. -> 50 J
Answer: (c).50 J
Question 315. What is the enthalpy change of a reaction at 35°C, if the enthalpy of reactant at 35°C and 25°C are 18 J and 10 J, and enthalpy of product at 35°C and 25°C are 12 J and 8 J, and the enthalpy change of reaction at 25°C is 15 J?
  1.    9 J
  2.    14 J
  3.    22 J
  4.    27 J
 Discuss Question
Answer: Option D. -> 27 J
Answer: (d).27 J
Question 316. What is the enthalpy change of a reaction at 45°C, if the enthalpy of reactant at 45°C and 25°C are 10 J and 6 J, and enthalpy of product at 45°C and 25°C are 15 J and 8 J, and the enthalpy change of reaction at 25°C is 10 J?
  1.    14 J
  2.    21 J
  3.    27 J
  4.    34 J
 Discuss Question
Answer: Option B. -> 21 J
Answer: (b).21 J
Question 317. What is the enthalpy change of a reaction at 90°C, if the enthalpy of reactant at 90°C and 25°C are 60 J and 25 J, and enthalpy of product at 90°C and 25°C are 80 J and 10 J, and the enthalpy change of reaction at 25°C is 5 J?
  1.    10 J
  2.    50 J
  3.    110 J
  4.    150 J
 Discuss Question
Answer: Option C. -> 110 J
Answer: (c).110 J
Question 318. What is the enthalpy change of a reaction at 35°C, if the enthalpy of reactant at 35°C and 25°C are 22 J and 15 J, and enthalpy of product at 35°C and 25°C are 10 J and 5 J, and the enthalpy change of reaction at 25°C is 36 J?
  1.    12 J
  2.    24 J
  3.    36 J
  4.    48 J
 Discuss Question
Answer: Option D. -> 48 J
Answer: (d).48 J
Question 319. What is the enthalpy of the reaction from 25°C to 40°C if CP = 10 J/°C, and the reference enthalpy is 10 J?
  1.    80 J
  2.    120 J
  3.    160 J
  4.    200 J
 Discuss Question
Answer: Option C. -> 160 J
Answer: (c).160 J
Question 320. What is the enthalpy of the reaction from 10°C to 25°C if CP = 2 J/°C, and the reference enthalpy is 20 J?
  1.    50 J
  2.    60 J
  3.    75 J
  4.    90 J
 Discuss Question
Answer: Option A. -> 50 J
Answer: (a).50 J

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