A. Increases kinetic energy and decreases pressure
B. Reduces kinetic energy and increases pressure
C. Reduces both kinetic energy and pressure
D. Increases both kinetic energy and pressure
✅ The correct answer is option A.
Engineering
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4082. The temperature at the eutectic point of the system is the __________ temperature that can be attained in the system.
A. Lowest
B. Highest
C. Average
D. None of these
✅ The correct answer is option A.
4083. Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the
A. Calorific value
B. Heat of reaction
C. Heat of combustion
D. Heat of formation
✅ The correct answer is option C.
4084. Which of the following is not correct for a reversible adiabatic process?
A. TVγ-1 = constant
B. P1-γ.TY = constant
C. PVγ = constant
D. None of these
✅ The correct answer is option D.
4085. Which of the following is not an extensive property?
A. Free energy
B. Entropy
C. Refractive index
D. None of these
✅ The correct answer is option C.
4086. Which of the following equations is used for the prediction of activity co-efficient from experiments?
A. Van Laar equation
B. Margules equation
C. Wilson’s equation
D. All of the above
✅ The correct answer is option D.
4087. The activity of an ideal gas is numerically __________ its pressure.
A. More than
B. Less than
C. Equal to
D. Data insufficient, can’t be predicted
✅ The correct answer is option C.
4088. Which of the following is not an equation of state?
A. Bertholet equation
B. Clausius Clayperon equation
C. Beattie-Bridgeman equation
D. None of these
✅ The correct answer is option B.
4089. All gases except __________ shows a cooling effect during throttling process at atmospheric temperature and pressure.
A. Oxygen
B. Nitrogen
C. Air
D. Hydrogen
✅ The correct answer is option D.
4090. In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about __________ percent.
A. 0.25
B. 0.5
C. 0.75
D. 1
✅ The correct answer is option B.