Thermodynamics for Chemical Mcqs

MCQ: One ton of refrigeration capacity is equivalent to the heat removal rate of____________________?

1. 50 kcal/hr
2. 200 BTU/hr
3. 200 BTU/minute
4. 200 BTU/day

MCQ: Entropy, which is a measure of the disorder of a system, is__________________?

1. Independent of pressure
2. Independent of temperature
3. Zero at absolute zero temperature for a perfect crystalline substance
4. All A, B. & C

MCQ: A refrigerator works on the principle of _____________ law of thermodynamics?

1. Zeroth
2. First
3. Second
4. Third

MCQ: Gibbs free energy (G) is represented by, G = H – TS, whereas Helmholtz free energy, A. is given by, A = E – TS. Which of the following is the Gibbs-Helmholtz equation ?

1. [∂(G/T)/∂T] = – (H/T2)
2. [∂(A/T)/∂T]V = – E/T2
3. Both A. and B.
4. Neither A. nor B.

MCQ: Pick out the correct statement?

1. Like internal energy and enthalpy, the absolute value of standard entropy for elementary substances is zero
2. Melting of ice involves increase in enthalpy and a decrease in randomness
3. The internal energy of an ideal gas depends only on its pressure
4. Maximum work is done under reversible conditions

MCQ: A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram. The net work done during the complete cycle is given by the area covered by_________________?

1. P1ACBP2P1
2. ACBB1A1A
3. ACBDA
4. ADBB1A1A

MCQ: The equation relating E, P, V and T which is true for all substances under all conditions is given by (∂E/∂V)T = T(∂P/∂T)H – P. This equation is called the ___________________?

1. Maxwell’s equation
2. Thermodynamic equation of state
3. Equation of state
4. Redlich-Kwong equation of state

MCQ: Cv is given by__________________?

1. (∂E/∂T)V
2. (∂E/∂V)T
3. (∂E/∂P)V
4. (∂V/∂T)P

MCQ: There is a change in ______________ during the phase transition?

1. Volume
2. Pressure
3. Temperature
4. All a, b & c

MCQ: In Joule-Thomson porous plug experiment, the__________________?

1. Enthalpy does not remain constant
2. Entire apparatus is exposed to surroundings
3. Temperature remains constant
4. None of these