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MCQs

Total Questions : 368 | Page 34 of 37 pages
Question 331. What is the heat of reaction if enthalpy of inputs and outputs at 25°C are 5 J and 8 J, the enthalpy of input and outputs at given temperature are 12 J and 15 J, enthalpy change of reaction is 25 J?
  1.    20 J
  2.    25 J
  3.    30 J
  4.    35 J
 Discuss Question
Answer: Option B. -> 25 J
Answer: (b).25 J
Question 332. What is the sensible heat of a reaction if the enthalpy of outputs is 15 J, and enthalpy of inputs is 5 J?
  1.    3 J
  2.    5 J
  3.    10 J
  4.    15 J
 Discuss Question
Answer: Option C. -> 10 J
Answer: (c).10 J
Question 333. What is the heat of reaction if enthalpy of inputs and outputs at 25°C are 10 J and 8 J, the enthalpy of input and outputs at given temperature are 5 J and 20 J, enthalpy change of reaction is 30 J?
  1.    13 J
  2.    22 J
  3.    28 J
  4.    35 J
 Discuss Question
Answer: Option A. -> 13 J
Answer: (a).13 J
Question 334. Energy out and Energy in of a system are 10 J and 25 J respectively, what is the efficiency of the system?
  1.    10%
  2.    40%
  3.    50%
  4.    80%
 Discuss Question
Answer: Option B. -> 40%
Answer: (b).40%
Question 335. Energy out and Energy in of a system are 10 J and 20 J respectively, what is the efficiency of the system?
  1.    20%
  2.    30%
  3.    40%
  4.    50%
 Discuss Question
Answer: Option D. -> 50%
Answer: (d).50%
Question 336. Energy out and Energy in of a system are 5 J and 25 J respectively, what is the efficiency of the system?
  1.    20%
  2.    40%
  3.    60%
  4.    80%
 Discuss Question
Answer: Option A. -> 20%
Answer: (a).20%
Question 337. Energy out and Energy in of a system are 15 J and 25 J respectively, what is the efficiency of the system?
  1.    40%
  2.    60%
  3.    80%
  4.    110%
 Discuss Question
Answer: Option B. -> 60%
Answer: (b).60%
Question 338. Energy out and Energy in of a system are 40 J and 25 J respectively, what is the efficiency of the system?
  1.    40%
  2.    80%
  3.    160%
  4.    200%
 Discuss Question
Answer: Option C. -> 160%
Answer: (c).160%
Question 339. 10 J of heat is supplied and 3 J is taken out, if the change in internal energy of the system is 5 J, what is the work done on the system?
  1.    2 J
  2.    – 2 J
  3.    5 J
  4.    – 5 J
 Discuss Question
Answer: Option B. -> – 2 J
Answer: (b).– 2 J
Question 340. 15 J of heat is supplied to a system and system does 5 J of work, what is the change in internal energy?
  1.    5 J
  2.    10 J
  3.    15 J
  4.    20 J
 Discuss Question
Answer: Option B. -> 10 J
Answer: (b).10 J

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