Related Questions
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During adiabatic expansion of gas
A. Pressure remains constant
C. Temperature remains constant
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The minimum number of phases that can exist in a system is
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In a working refrigerator, the value of COP is always
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What happens in a reversible adiabatic expansion process?
D. Temperature is constant
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The change in Gibbs free energy for vaporisation of a pure substance is
D. May be positive or negative
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The internal energy of an incompressible fluid depends upon its
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The second law of thermodynamics states that
A. The energy change of a system undergoing any reversible process is zero
B. It is not possible to transfer heat from a lower temperature to a higher temperature
C. The total energy of system and surrounding remains the same
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Refrigerants commonly used for domestic refrigerators are
A. Ethyl chloride or methyl chloride
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In the reaction, H2 +I2 2HI, addition of an inert gas will
A. Increase the partial pressure of H2
B. Increase the partial pressure of I2
C. Increase the total pressure and hence shift the equilibrium towards the right
D. Not affect the equilibrium conditions
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Pick out the correct statement.
A. A real gas on expansion in vacuum gets heated up
B. An ideal gas on expansion in vacuum gets cooled
C. An ideal gas on expansion in vacuum gets heated up
D. A real gas on expansion in vacuum cools down whereas ideal gas remains unaffected
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The acentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr-1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of acentric factor is always
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A refrigerator may be termed as a
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The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.
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Lowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in
D. Increased or decreased COP; depending upon the type of refrigerant
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The temperature at which both liquid and gas phases are identical, is called the __________ point.
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Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.
C. Energy transformation from one form to another
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The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.
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Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 PCl3 + Cl2.Degree of dissociation of PCl5 will
A. Decrease on addition of Cl2
B. Increase on addition of an inert gas at constant pressure
C. Decrease on increasing the pressure of the system
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If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the
B. Clausius-Clapeyron Equation
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Which of the following liquid metals has the highest thermal conductivity?
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Which of the following is not an equation of state?
B. Clausius-Clapeyron equation
C. Beattie-Bridgeman equation
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Cp of a gas at its critical temperature and pressure
D. Equals 0.24 kcal/kmol °K
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Number of phases in a colloidal system is:
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Joule-Thomson co-efficient is defined as
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What is the ratio of adiabatic compressibility to isothermal compressibility?
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Specific __________ does not change during phase change at constant temperature and pressure.
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__________ explains the equilibrium constant for any chemical reaction.
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In Joule-Thomson porous plug experiment, the
A. Enthalpy does not remain constant
B. Entire apparatus is exposed to surroundings
C. Temperature remains constant
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The equation, Cp - Cv = R, is true for __________ gas.
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Third law of thermodynamics is concerned with the
A. Value of absolute entropy
C. Direction of energy transfer