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
COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about____________________?
(A) 0.5
(B) 3.5
(C) 4.5
(D) 8.5
The unity of Planck’s constant ‘h’ in the equation, E = hv is____________________?
(A) J/s
(B) J.S
(C) J/kmol
(D) kmol/J
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___________________?
(A) Same in both the phases
(B) Zero in both the phases
(C) More in vapour phase
(D) More in liquid phase
Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which___________________?
(A) A homogeneous solution (say of phenol water) is formed
(B) Mutual solubility of the two liquids shows a decreasing trend
(C) Two liquids are completely separated into two layers
(D) None of these
Maxwell’s relation corresponding to the identity, dH = dS = Vdp + Σμi dni is_____________________?
(A) (∂T/∂V)S, ni = -(∂P/∂S)V, ni
(B) (∂S/∂P)T, ni = (∂V/∂T)P, ni
(C) (∂S/∂V)T, ni = (∂P/∂T)V, ni
(D) (∂T/∂P)S, ni = (∂V/∂S)P, ni
A system is said to be isopiestic, if there is no ______________ change?
(A) Temperature
(B) Pressure
(C) Volume
(D) None of these
Gibbs-Duhem equation_____________________?
(A) States that n1dμ1 + n2dμ2 + ….njdμj = 0, for a system of definite composition at constant temperature and pressure
(B) Applies only to binary systems
(C) Finds no application in gas-liquid equilibria involved in distillation
(D) None of these