Thermodynamics for Chemical Mcqs


Q.  ________________ decreases during adiabatic throttling of a perfect gas?

a. Entropy
b. Temperature
c. Enthalpy
d. Pressure


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  The internal energy of an ideal gas does not change in a reversible _____________ process?
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MCQs:  In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when___________________?
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MCQs:  The melting point of paraffin wax (which contracts on solidification) _______________ with pressure rise?
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MCQs:  Which of the following is not an equation of state ?
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MCQs:  What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor ?
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MCQs:  A system is said to be isopiestic, if there is no ______________ change?
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MCQs:  Maxwell’s relation corresponding to the identity, dH = dS = Vdp + Σμi dni is_____________________?
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MCQs:  Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which___________________?
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MCQs:  Which is not a refrigerant ?
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MCQs:  When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is___________________?
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MCQs:  The value of gas constant ‘R’ is__________________?
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MCQs:  The unity of Planck’s constant ‘h’ in the equation, E = hv is____________________?
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MCQs:  COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about____________________?
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MCQs:  In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about _____________ percent?
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MCQs:  Lowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in__________________?
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MCQs:  (1/V) (∂V/∂T)P is the mathematical expression__________________?
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MCQs:  Domestic refrigerator usually works on the _____________ refrigeration cycle?
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MCQs:  _______________ functions are exemplified by heat and work ?
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MCQs:  Chemical potential is a/an_____________________?
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MCQs:  In the reaction, represented by, 2SO2 + O2 ⇌ 2SO3; ΔH = – 42 kcal; the forward reaction will be favoured by____________________?
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