For an isothermal process, the internal energy of a gas____________________?
(A) Increases
(B) Decreases
(C) Remains unchanged
(D) Data insufficient, can’t be predicted
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
Work done in case of free expansion is____________________?
(A) Indeterminate
(B) Zero
(C) Negative
(D) None of these
When a gas is subjected to adiabatic expansion, it gets cooled due to__________________?
(A) Decrease in velocity
(B) Decrease in temperature
(C) Decrease in kinetic energy
(D) Energy spent in doing work
A solid is transformed into vapour without going to the liquid phase at_________________?
(A) Triple point
(B) Boiling point
(C) Below triple point
(D) Always
A Carnot cycle consists of the following steps ?
(A) Two isothermal and two isentropic
(B) Two isobaric and two isothermal
(C) Two isochoric and two isobaric
(D) Two isothermals and two isochoric
“The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances”. This is the_________________?
(A) Lewis-Randall rule
(B) Statement of Van’t Hoff Equation
(C) Le-Chatelier’s principle
(D) None of these
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
Cp – Cv = R is valid for ______________ gases?
(A) Ideal
(B) Very high pressure
(C) Very low temperature
(D) All of the above
Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor ?
(A) d ln p/dt = Hvap/RT2
(B) d ln p/dt = RT2/Hvap
(C) dp/dt = RT2/Hvap
(D) dp/dt = Hvap/RT2