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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
For an ideal solution, the value of activity co-efficient is

< 1
1
> 1

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Chemical Engineering Thermodynamics
Co-efficient of Performance (COP) of a refrigerator is the ratio of the

Work required to refrigeration obtained
Higher to lower temperature
Lower to higher temperature
Refrigeration obtained to the work required

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Chemical Engineering Thermodynamics
A gas shows deviation from ideal behaviour at

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

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Chemical Engineering Thermodynamics
The change in Gibbs freee energy for vaporisation of a pure substance is

Zero
May be positive or negative
Negative
Positive

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Chemical Engineering Thermodynamics
Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will

Remain unchanged
Decrease
Increase
First fall and then rise

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Chemical Engineering Thermodynamics
Which of the following processes can not be made reversible even under ideal condition of operation?

All of these
Free expansion of a gas
Compression of air in a compressor
Expansion of steam in a turbine

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