## Lakshya Education MCQs

Question: If a system after undergoing a series of processes, returns to the initial state then
Options:
 A. Process is thermodynamically in equilibrium B. Process is executed in closed system cycle C. Its entropy will change due to irreversibility D. Sum of heat and work transfer will be zero
Answer: Option D

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## More Questions on This Topic :

Question 1. When coal is first dried and then crushed to a fine powder by pulverizing machine, the resulting fuel is called
1.     Wood charcoal
2.     Bituminous coal
3.     Briquetted coal
4.     None of these
Answer: Option D
Question 2. For reversible adiabatic process, change in entropy is
1.     Maximum
2.     Minimum
3.     Zero
4.     Negative
Answer: Option C
Question 3. When coal is first dried and then crushed to a fine powder by pulverizing machine, the resulting fuel is called
1.     Wood charcoal
2.     Bituminous coal
3.     Briquetted coal
4.     None of these
Answer: Option D
Question 4. For reversible adiabatic process, change in entropy is
1.     Maximum
2.     Minimum
3.     Zero
4.     Negative
Answer: Option C
Question 5. For reversible adiabatic process, change in entropy is
1.     Maximum
2.     Minimum
3.     Zero
4.     Negative
Answer: Option C
Question 6. The general gas energy equation is (where q1 - 2 = heat supplied, du = change in internal energy, and w1 - 2 = work done in heat units)
1.     Q1 - 2 = dU + W1 - 2
2.     Q1 - 2 = dU - W1 - 2
3.     Q1 - 2 = dU/W1 - 2
4.     Q1 - 2 = dU × W1 - 2
Answer: Option A

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