A. Like internal energy and enthalpy, the absolute value of standard entropy for elementary substances is zero
B. Melting of ice involves increase in enthalpy and a decrease in randomness
C. The internal energy of an ideal gas depends only on its pressure
D. Maximum work is done under reversible conditions
Related Mcqs:
- Pick out the correct statement?
A. If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container,
the temperature of the liquid will increase
B. A process is irreversible as long as Δ S for the system is greater than zero
C. The mechanical work done by a system is always equal to∫P.dV
D. The heat of formation of a compound is defined as the heat of reaction leading to the
formation of the compound from its reactants - Pick out the correct equation relating ‘F’ and ‘A’___________________?
A. F = A + PV
B. F = E + A
C. F = A – TS
D. F = A + TS - Pick out the wrong statement. A. The conversion for a gas phase reaction increases with decrease in pressure, if there is an increase in volume accompanying the reaction________________?
B. With increase in temperature, the equilibrium constant increases for an exothermic reaction
C. The equilibrium constant of a reaction depends upon temperature only
D. The conversion for a gas phase reaction increases with increase in pressure, if there is a
decrease in volume accompanying the reaction - 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
D. None of these - Pick out the wrong statement ?
A. At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature
B. Normally, the gases which are easily liquefied are more soluble in common solvents
C. The gases which are capable of forming ions in aqueous solution are much more soluble in
water than in other solvents
D. At constant pressure, solubility of a gas in a liquid increases with rise in temperature - Pick out the wrong statement ?
A. Minimum number of degree of freedom of a system is zero
B. Degree of freedom of a system containing a gaseous mixture of helium, carbon dioxide and
hydrogen is 4
C. For a two phase system in equilibrium made up of four non-reacting chemical species, the
number of degrees of freedom is 4
D. Enthalpy and internal energy change is zero during phase change processes like melting,
vaporisation and sublimation - Pick out the wrong statement_________________?
A. Phase rule variables are intensive properties
B. Heat and work are both state function
C. The work done by expansion of a gas in vacuum is zero
D. CP and CV are state function - Pick out the Clausius-Clapeyron equation from the following?
A. dP/dT = ΔH/TΔV
B. ln P = – (ΔH/RT) + constant
C. ΔF = ΔH + T [∂(ΔF)/∂T]P
D. None of these - Pick out the undesirable property for a good refrigerant ?
A. High thermal conductivity
B. Low freezing point
C. Large latent heat of vaporisation
D. High viscosity - 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
