## COP of a refrigerator drawing 1 kW of power per ton of refrigeration…

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# Thermodynamics for Chemical

## The unity of Planck’s constant ‘h’ in the equation, E = hv is____________________?

The unity of Planck’s constant ‘h’ in the equation, E = hv is____________________? A. J/sB. J.S C. J/kmol D. kmol/J

## The value of gas constant ‘R’ is__________________?

The value of gas constant ‘R’ is__________________? A. 1.987 cal/gm mole °K B. 1.987 BTU/lb. mole °RC. Both A. and B D. Neither A. nor B

## When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature…

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…

## Which is not a refrigerant ?

Which is not a refrigerant ? A. SO2 B. NH3 C. CCl2F2D. C2H4Cl2

## Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g.,…

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.…

## Maxwell’s relation corresponding to the identity, dH = dS = Vdp + Σμi dni is_____________________?

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, niD. (∂T/∂P)S, ni = (∂V/∂S)P, ni…

## A system is said to be isopiestic, if there is no ______________ change?

A system is said to be isopiestic, if there is no ______________ change? A. TemperatureB. Pressure C. Volume D. None of these

## What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen…

What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor ? A. 2 B. 0 C. 3 D. 1

## The melting point of paraffin wax (which contracts on solidification) _______________ with pressure…

The melting point of paraffin wax (which contracts on solidification) _______________ with pressure rise? A. Increases B. Decreases C. Remains unchanged D. Decreases linearly

## In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve…

In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when___________________? A. Cp < CvB. Cp = Cv C. Cp > Cv D. C ≥ Cv