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4

Which of the following diagrams does not represent an Otto cycle?

A.

B.

C.

D. None of these

Correct Answer :

C.


Related Questions

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4

Pick out the wrong statement.

A. A closed system does not permit exchange of mass with its surroundings but may permit exchange of energy.

B. An open system permits exchange of both mass and energy with its surroundings

C. The term microstate is used to characterise an individual, whereas macro-state is used to designate a group of micro-states with common characteristics

D. None of the above

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4

In case of a close thermodynamic system, there is __________ across the boundaries.

A. No heat and mass transfer

B. No mass transfer but heat transfer

C. Mass and energy transfer

D. None of these

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4

Helmholtz free energy (A) is defined as

A. A = H - TS

B. A = E - TS

C. A = H + TS

D. None of these

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4

In the decomposition of PCl5 represented by, PCl5 PCl3 + Cl2, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.

A. Increase

B. Decrease

C. Not alter

D. None of these

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4

Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the

A. Calorific value

B. Heat of reaction

C. Heat of combustion

D. Heat of formation

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4

If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in

A. Volume

B. Enthalpy

C. Both (A) & (B)

D. Neither (A) nor (B)

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4

(1/V) (∂V/∂T)P is the mathematical expression

A. Joule-Thomson co-efficient

B. Specific heat at constant pressure (Cp)

C. co-efficient of thermal expansion

D. Specific heat at constant volume (CV)

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4

In a reversible process

A. Tds = dE + dW

B. dE - dW = Tds

C. dW - dE = Tds

D. Tds - dW + dE >0

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4

Ideal refrigeration cycle is

A. Same as Carnot cycle

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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4

Degree of freedom of the system ice-watervapour will be

A. 0

B. 1

C. 2

D. 3

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4

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

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4

Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature __________ as its mole fraction increases.

A. Decreases

B. Decreases exponentially

C. Increases

D. Remain constant

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4

A system in which there is exchange of energy but not of mass, is called a/an __________ system.

A. Isolated

B. Open

C. Insulated

D. Closed

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4

Standard temperature and pressure (S.T.P.) is

A. 0°C and 750 mm Hg

B. 15°C and 750 mm Hg

C. 0°C and 1 kgf/cm2

D. 15°C and 1 kgf/cm2

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Sound waves propagation in air exemplifies an __________ process.

A. Adiabatic

B. Isothermal

C. Isometric

D. None of these

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At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)

A. μ° + RT ln f

B. μ°+ R ln f

C. μ° + T ln f

D. μ° + R/T ln f

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4

Internal energy of an ideal gas

A. Increases with increase in pressure

B. Decreases with increase in temperature

C. Is independent of temperature

D. None of these

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4

In case of a reversible process (following pvn = constant), work obtained for trebling the volume (v1 = 1 m3 and v23 m3) is maximum, when the value of 'n' is

A. 0

B. 1

C. y = 1.44

D. 1.66

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4

Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is

A. 1

B. 2

C. 3

D. 4

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4

The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.

A. Increases

B. Decreases

C. Remains unchanged

D. Decreases linearly

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4

For a single component two phase mixture, the number of independent variable properties are

A. Two

B. One

C. Zero

D. Three

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4

Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a

A. Straight line

B. Sine curve

C. Parabola

D. Hyperbola

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4

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

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4

What is the degree of freedom for a system comprising liquid water equilibrium with its vapour?

A. 0

B. 1

C. 2

D. 3

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4

Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of

A. Fusion

B. Vaporisation

C. Transition

D. None of these

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4

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

A. A . x22

B. Ax1

C. Ax2

D. Ax12

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4

In a turbine, the fluid expands almost

A. Isothermally

B. Isobarically

C. Adiabatically

D. None of these

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4

PVγ = Constant (where, γ = Cp/Cv) is valid for a/an __________ process.

A. Isothermal

B. Isentropic

C. Isobaric

D. Adiabatic

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4

An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas during the cycle is equal to

A. 12 P1V1

B. 6 P1 V1

C. 3 P1V1

D. P1 V1

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(∂H/∂T)P is the mathematical expression for

A. CV

B. Entropy change

C. Gibbs free energy

D. None of these