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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
Refrigerants commonly used for domestic refrigerators are

NH₃ or CO₂
Propane
Ethyl chloride or methyle chloride
Freon-12

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Chemical Engineering Thermodynamics
Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of

Fusion
Vaporisation
Sublimation
Transition

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Chemical Engineering Thermodynamics
A gas shows deviation from ideal behaviour at

Low pressure and low temperature
Low pressure and high temperature
Low temperature and high pressure
High temperature and high pressure

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

(T₁ - T₂)/T₁
(T₁ - T₂)/T₂
T₂/(T₁ - T₂)
T₁/(T₁ - T₂)

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Chemical Engineering Thermodynamics
Melting of ice is an example of an __________ process.

Isothermal
Isometric
None of these
Adiabatic

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Chemical Engineering Thermodynamics
Which of the following has the minimum value of COP for a given refrigeration effect?

Vapour-compression process with a reversible expansion engine
Ordinary vapour-compression cycle
Reverse Carnot cycle
Air refrigeration cycle

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