Related Questions

When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the
A Le-Chatelier principle
B Kopp's rule
C Law of corresponding state
D Arrehenius hypothesis
A system is said to be at equilibrium, if the entropy of the system has reached __________ value.
A Minimum
B Zero
C Maximum
D None of these
High pressure steam is expanded adiabati-cally and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process:
A ΔH = 0 and ΔS = 0
B ΔH ≠ 0 and ΔS = 0
C ΔH ≠ 0 and ΔS ≠ 0
D ΔH = 0 and ΔS ≠ 0
A finite verb does not change with the change of ...…
A subject
B tense
C number
D gender
When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as
A Thermodynamic law
B Thermodynamic process
C Thermodynamic cycle
D None of these
Entropy change for an irreversible process taking system and surrounding together is
A 0
B > 0
C None of these
Entropy change for an irreversible isolated system is
A ∞
B 0
C > 0
In a simple on-off controller with differential gap, the magnitude of differential gap determines
A The level of accuracy
B The life of controller
C Both (a) and (b)
D Neither (a) nor (b)
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
A H
B 12.6 H
C 13.6 H
D 14.6 H
Entropy change depends on
A Heat transfer
B Mass transfer
C Change of temperature
D Thermodynamic state

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