Related Questions
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The equilibrium constant for a chemical reaction at two different temperatures is given by
A. Kp2/Kp1 = - (ΔH/R) (1/T2 - 1/T1)
B. Kp2/Kp1 = (ΔH/R) (1/T2 - 1/T1)
C. Kp2/Kp1 = ΔH (1/T2 - 1/T1)
D. Kp2/Kp1 = - (1/R) (1/T2 - 1/T1)
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Ideal refrigeration cycle is
B. Same as reverse Carnot cycle
C. Dependent on the refrigerant's properties
D. The least efficient of all refrigeration processes
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The expression for entropy change given by, ΔS = nR ln (V2/V1) + nCv ln (T2/T1) is valid for
A. Reversible isothermal volume change
B. Heating of a substance
C. Cooling of a substance
D. Simultaneous heating and expansion of an ideal gas
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Ideal gas law is applicable at
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In the decomposition of PCl5 represented by, PCl5 PCl3 + Cl2, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.
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What is the ratio of adiabatic compressibility to isothermal compressibility?
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Entropy change of the reaction, H2O (liquid) → H2O (gas), is termed as the enthalpy of
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Gibbs phase rule finds application, when heat transfer occurs by
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Partial molar free energy of an element A in solution is same as its
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During a reversible isothermal expansion of an ideal gas, the entropy change is
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With increase in temperature, the internal energy of a substance
D. May increase or decrease; depends on the substance
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For spontaneous changes in an isolated system (S = entropy)
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The expression, nCv(T2 - T1), is for the __________ of an ideal gas.
A. Work done under adiabatic condition
B. Co-efficient of thermal expansion
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Water on heating from 1 to 4°C
D. May contract or expand
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If atmospheric temperature and dew point are nearly equal, then the relative humidity is
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Which of the following is affected by the temperature?
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Standard temperature and pressure (S.T.P.) is
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The specific heat of saturated water vapour at 100°C is
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Critical temperature is defined as the temperature above which a gas will
A. Not liquify (barring exceptions)
C. Never liquify however high the pressure may be
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For an ideal gas, the internal energy depends upon its __________ only.
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Isentropic process means a constant __________ process.
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If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in
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A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?
A. Vapor compression cycle using expansion valve
B. Air refrigeration cycle
C. Vapor compression cycle using expansion engine
D. Carnot refrigeration cycle
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In an irreversible process
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The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x1. x2, where A is a constant. The corresponding equation for ln y1, where y1 is the activity co-efficient of component 1, is
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Which of the following liquid metals has the highest thermal conductivity?
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For an incompressible fluid, the __________ is a function of both pressure as well as temperature.
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When pressure is applied on the system, ice ↔ water, then
A. Equilibrium cannot be established
B. More ice will be formed
C. More water will be formed
D. Evaporation of water will take place
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At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be
D. More or less; depending on the system
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Entropy is a measure of the __________ of a system.
C. Temperature changes only