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MCQs

Total Questions : 368 | Page 31 of 37 pages
Question 301. Heat of formations of A, B, C, and D, are 1 J, 2 J, 3 J, and 4 J respectively, what is the heat of reaction 3A + 4B -> 2C + D?
  1.    -1 J
  2.    1 J
  3.    3 J
  4.    6 J
 Discuss Question
Answer: Option A. -> -1 J
Answer: (a).-1 J
Question 302. Heat of formations of A, B, C, and D, are 3 J, 5 J, 4 J, and 8 J respectively, what is the heat of reaction 2A + 2B -> 2C + D?
  1.    -5 J
  2.    0
  3.    5 J
  4.    8 J
 Discuss Question
Answer: Option B. -> 0
Answer: (b).0
Question 303. Heat of formations of A, B, C, and D, are 2 J, 5 J, 3 J, and 10 J respectively, what is the heat of reaction 4A + 5B -> 2C + 2D?
  1.    -10 J
  2.    -7 J
  3.    -5 J
  4.    0
 Discuss Question
Answer: Option B. -> -7 J
Answer: (b).-7 J
Question 304. What is the change in internal energy of 2 mole of air (Cv = 2.1 X 10⁴ J/mole°C), if its temperature changes from 10°C to 20°C?
  1.    420 kJ
  2.    540 kJ
  3.    840 kJ
  4.    1050 kJ
 Discuss Question
Answer: Option A. -> 420 kJ
Answer: (a).420 kJ
Question 305. What is the change in internal energy for a process which has final and initial states are exactly similar?
  1.    Positive
  2.    Negative
  3.    Zero
  4.    Cannot say
 Discuss Question
Answer: Option C. -> Zero
Answer: (c).Zero
Question 306. What is the change in internal energy of 1 mole of air ((Cv = 2.1 X 10⁴ J/mole°C), if its temperature changes from 10°C to 5°C?
  1.    84 kJ
  2.    105 kJ
  3.    – 84 kJ
  4.    – 105 kJ
 Discuss Question
Answer: Option D. -> – 105 kJ
Answer: (d).– 105 kJ
Question 307. Ratio of change in internal energy of a substance from 4°C to T and from T to 10°C is 2, what is T?
  1.    5°C
  2.    6°C
  3.    7°C
  4.    8°C
 Discuss Question
Answer: Option D. -> 8°C
Answer: (d).8°C
Question 308. Ratio of change in internal energy of a substance from 15°C to T and from T to 10°C is – 2, what is T?
  1.    5°C
  2.    15°C
  3.    20°C
  4.    30°C
 Discuss Question
Answer: Option A. -> 5°C
Answer: (a).5°C
Question 309. What is the enthalpy of reaction for C + O₂ -> CO₂, if the conversion of C is 50%, and heat of formation of C, O₂, and CO₂ are 0, 0 and 10 J.
  1.    5 J
  2.    10 J
  3.    15 J
  4.    20 J
 Discuss Question
Answer: Option A. -> 5 J
Answer: (a).5 J
Question 310. What is the enthalpy of reaction forC₆H₆ -> 3C₂H₂, if the conversion of C₆H₆ is 80%, and heat of formation of C₆H₆, and C₂H₂ are 24 J, and 8 J?
  1.    0
  2.    2.4 J
  3.    4.8 J
  4.    5.6 J
 Discuss Question
Answer: Option C. -> 4.8 J
Answer: (c).4.8 J

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