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What is the correct answer?

4

On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will

A. Increase

B. Decrease

C. Remain same

D. Increase in summer and will decrease in winter

Correct Answer :

A. Increase


Related Questions

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4

Extensive properties of a thermodynamic system depend upon the __________ of the system.

A. Specific volume

B. Temperature

C. Mass

D. Pressure

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4

What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope?

A. 0

B. 2

C. 1

D. 3

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4

No work is done by the system, when a reaction occurs at constant

A. Volume

B. Temperature

C. Pressure

D. None of these

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4

Sublimation temperature of dry ice (solid CO2) is __________ °C.

A. -273

B. 0

C. -78

D. 5

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4

During the phase transition, __________ changes.

A. Pressure

B. Volume

C. Temperature

D. All (A), (B) and (C)

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4

Trouton's ratio of __________ liquids is calculated using Kistyakowsky equation.

A. Polar

B. Non-polar

C. Both (A) & (B)

D. Neither (A) nor (B)

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4

Efficiency of a Carnot engine working between temperatures T1 and T2 (T1 < T) is

A. (T2 - T1)/T2

B. (T2 - T1)/T1

C. (T1 - T2)/T2

D. (T1 - T2)/T1

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4

Joule-Thomson co-efficient for a perfect gas is

A. Zero

B. Positive

C. Negative

D. None of these

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4

What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?

A. 0

B. 1

C. 2

D. 3

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4

For a multi-component system, the term chemical potential is equivalent to the

A. Molal concentration difference

B. Molar free energy

C. Partial molar free energy

D. Molar free energy change

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4

Ideal gas law is applicable at

A. Low T, low P

B. High T, high P

C. Low T, high P

D. High T, low P

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4

Co-efficient of performance for a reversed Carnot cycle working between temperatures T1 and T2 (T1 > T2) is

A. T2/(T1 - T2)

B. T1/(T1 - T2)

C. (T1 - T2)/T1

D. (T1 - T2)/T2

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4

In an irreversible process

A. Tds = dE - dW = 0

B. dE - dW - Tds = 0

C. Tds - dE + dW < 0

D. Tds - dT + dW < 0

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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

Work done in an adiabatic process between two states depends on the

A. Rate of heat transmission

B. Initial state only

C. End states only

D. None of these

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4

Chemical potential of ith component of a system is given by

A. μi = (∂F/∂ni)T, P, ni

B. μi = (∂A/∂ni)T, P, ni

C. μi = (∂F/∂ni)T, P

D. μi = (∂A/∂ni)T, P

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4

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

A. Specific heat at constant pressure (Cp)

B. Specific heat at constant volume (Cv)

C. Joule-Thompson co-efficient

D. None of these

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4

The necessary condition for phase equilibrium in a multiphase system of N components is that the

A. Chemical potentials of a given component should be equal in all phases

B. Chemical potentials of all components should be same in a particular phase

C. Sum of the chemical potentials of any given component in all the phases should be the same

D. None of these

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4

The kinetic energy of gas molecule is zero at

A. 0°C

B. 273°C

C. 100°C

D. -273°C

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4

Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.

A. Reaction mechanism

B. Calculation of rates

C. Energy transformation from one form to another

D. None of these

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4

The ammonia synthesis reaction represented by N2 + 3H2 2NH3; ΔH = - 22.4 kcal, is

A. Endothermic

B. Exothermic

C. Isothermal

D. Adiabatic

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4

A/an __________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor.

A. Isolated

B. Closed

C. Open

D. None of these

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4

The energy of activation of exothermic reaction is

A. Zero

B. Negative

C. Very large compared to that for endothermic reaction

D. Not possible to predict

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4

Clausius-Clapeyron equation is applicable to __________ equilibrium processes.

A. Solid-vapor

B. Solid-liquid

C. Liquid-vapor

D. All (A), (B) and (C)

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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

Claude's liquefaction process employs the cooling of gases by

A. Expansion in an engine

B. Following a constant pressure cycle

C. Throttling

D. None of these

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4

Pick out the correct statement.

A. The available energy in an isolated system for all irreversible (real) processes decreases

B. The efficiency of a Carnot engine increases, if the sink temperature is decreased

C. The reversible work for compression in non-flow process under isothermal condition is the change in Helmholtz free energy

D. All (A), (B) and (C)

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4

Clapeyron Equation deals with the

A. Rate of change of vapour pressure with temperature

B. Effect of an inert gas on vapour pressure

C. Calculation of ΔF for spontaneous phase change

D. Temperature dependence of heat of phase transition

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4

The necessary and sufficient condition for equilibrium between two phases is

A. The concentration of each component should be same in the two phases

B. The temperature of each phase should be same

C. The pressure should be same in the two phases

D. The chemical potential of each component should be same in the two phases

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4

Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be

A. 580

B. 640

C. 1160

D. Data insufficient; can't be computed