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MCQs

Total Questions : 368 | Page 6 of 37 pages
Question 51. In the reaction 2H₂ + O₂ -> 2H₂O, if the heat liberated is 50 J, what is the heat of formation of H₂O?
  1.    -25 J
  2.    25 J
  3.    -50 J
  4.    50 J
 Discuss Question
Answer: Option A. -> -25 J
Answer: (a).-25 J
Question 52. In the reaction 2C + O₂-> 2CO, if the heat liberated is 10 J, what is the heat of formation of CO?
  1.    -5 J
  2.    5 J
  3.    -10 J
  4.    10 J
 Discuss Question
Answer: Option A. -> -5 J
Answer: (a).-5 J
Question 53. In the reaction C + 2H₂ -> CH₄, if the heat liberated is -5 J, what is the heat of formation of CH₄?
  1.    -5J
  2.    5 J
  3.    0 J
  4.    Cannot be determined
 Discuss Question
Answer: Option B. -> 5 J
Answer: (b).5 J
Question 54. In the reaction 2N -> N₂, if the heat liberated is 6 J, what is the heat of formation of N₂?
  1.    – 6 J
  2.    6 J
  3.    0
  4.    Cannot be determined
 Discuss Question
Answer: Option A. -> – 6 J
Answer: (a).– 6 J
Question 55. In the reaction C + O₂ -> CO₂, if the heat liberated is 10 J, what is the heat of formation of CO₂?
  1.    -10 J
  2.    10 J
  3.    0
  4.    Cannot be determined
 Discuss Question
Answer: Option A. -> -10 J
Answer: (a).-10 J
Question 56. The standard heat of reaction is heat of reaction for how many mole of compound?
  1.    0
  2.    1
  3.    2
  4.    3
 Discuss Question
Answer: Option B. -> 1
Answer: (b).1
Question 57. What is the heat of reaction for C₂H₄ + 3O₂ -> 2CO₂ + 2H₂O, if heat of formation of C₂H₄, O₂, CO₂, and H₂O are 10 J, 5 J, 6 J and 2 J respectively?
  1.    -4 J
  2.    -2 J
  3.    0
  4.    4 J
 Discuss Question
Answer: Option A. -> -4 J
Answer: (a).-4 J
Question 58. What is the heat of reaction for CH₄ + 2O₂ -> CO₂ + 2H₂O, if heat of formation of CH₄, O₂, CO₂ and H₂O are 10 J, 5 J, 6 J, and 12 J respectively?
  1.    -10 J
  2.    10 J
  3.    -20 J
  4.    20 J
 Discuss Question
Answer: Option B. -> 10 J
Answer: (b).10 J
Question 59. What is the heat of reaction for C₆H₆ + 3H₂ -> C₆H₁₂, if heat of formation of C₆H₆, H₂, and C₆H₁₂ are 25 J, 5 J and 50 J respectively?
  1.    10 J
  2.    20 J
  3.    30 J
  4.    35 J
 Discuss Question
Answer: Option A. -> 10 J
Answer: (a).10 J
Question 60. What is the heat of reaction for 2H₂ + O₂ -> 2H₂O, if heat of formation of H₂, O₂, and H₂O are 2 J, 5 J, and 10 J respectively?
  1.    2 J
  2.    5 J
  3.    8 J
  4.    11 J
 Discuss Question
Answer: Option D. -> 11 J
Answer: (d).11 J

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