ONLINE TEST - Thermodynamics – II - EM

This Quiz is a Simple test for +2 Science group students which contain Questions asked from March - 2006 to March - 2017 in Thermodynamics – II. Just participate in it and test your skill.

1. According to Trouton's rule, the value of change in entropy of vaporization is
21 cal. deg–1 mole–1
12 cal. deg– 1 mol
21 kcal. deg. mole–1
12 kcal. deg. mol–1


2. All the naturally occurring processes proceed spontaneously in a direction which leads to
decrease of entropy
increase in enthalpy
increase in free energy
decrease of free energy


3. Change in Gibbs free energy is given by
ΔG = ΔH + TΔS
ΔG = ΔH – TΔS
ΔG = ΔH x TΔS
ΔG = TΔS – ΔH


4. Entropy (S) and the entropy change (ΔS) of a process
are path functions
are state functions
are constants
have no values


5. Entropy is a ___________ function
state
path
exact
inexact


6. For the reaction 2Cl(g) → Cl2(g), the signs of ΔH and ΔS are respectively
+, –
+, +
–, –
–, +


7. Free energy (G) and the free energy change (ΔG) correspond to the
system only
surrounding only
system and surrounding
all of these


8. H2O(l) → H2O(g), In this process the entropy
remains constant
decreases
increases
becomes zero


9. If ΔG for a reaction is negative, the change is
spontaneous
non-spontaneous
reversible
equilibrium


10. In an adiabatic process which of the following is correct?
q = w
q = 0
ΔE = q
PΔV = 0


11. In SI unit 1 eu is
41.84 EU
4.184 EU
418.4 EU
4184 EU


12. In which of the process is always non-feasible?
ΔH > O, ΔS > O
ΔH < O, ΔS > O
ΔH > O, ΔS < O
ΔH < O, ΔS < O


13. Standard free energies of formation of elements are taken as
positive
negative
zero
all of these


14. The amount of heat exchanged with the surrounding at constant temperature and pressure is called
ΔE
ΔH
ΔS
ΔG


15. The amount of heat exchanged with the surroundings at constant pressure is called
ΔE
ΔH
ΔS
ΔG


16. The entropy change (ΔS(fusion)) involved in the process of H2O(s) → H2O(l) at 0°C and 1 atm pressure involving ΔH(fusion) = 6008 Jmol^–1 is
22.007 Jmol–1 K–1
22.007 Jmol K–1
220.07 Jmol–1 K–1
2.2007 Jmol–1 K–1


17. The entropy change involved in the process water (liq) to water (vapor, 373K) involving ΔHvap =
10.952 J mol–1 K–1
109.52 J mol–1 K–1
100.952 J mol–1 K–1
1095.2 J mol–1 K–1


18. The network obtained from a system is given by
w – PΔV
w + PΔV
– w + PΔV
– w – PΔV


19. The percentage efficiency of a heat engine that operates between 127°C and 27°C is
20%
50%
100%
25%


20. Thermodynamic condition for irreversible spontaneous process at constant T and P is
ΔG < 0
ΔS < 0
ΔG > 0
ΔH > 0


21. When a liquid boils, there is
an increase in entropy
a decrease in entropy
an increase in heat of vaporization
an increase to free energy


22. Which of the following does not result in an increase in the entropy?
Rusting of iron
Crystallisation of sucrose from solution
Sublimation of camphor
Conversion of ice to water


23. Which one of the following is a state function?
q
Δq
w
ΔS


24. The entropy change for the following process possessing ΔH(transition) as 2090 J .mol–1 1mole Sn (α, 13°C) ⇌ 1mole Sn (β, 13°C) is
22.007 J. mol –1 K–1
7.307 J. mol–1 K–1
0.314 J. mol–1 K–1
109.52 J.mol–1 K–1


25. For an isothermal process, the entropy change of the universe during a reversible process is:
Zero
More
Less
None of the above


26. The SI unit of entropy is :
Cal K–1 mol –1
erg K–1 mol –1
J deg–1 mol –2
J K–1 mol –1


27. Which is the correct statement of IInd law of thermodynamics?
A process accompanied by decrease in entropy tends to be spontaneous
Efficiency of a machine can be cent percent
It is impossible to transfer heat from a cold body to a hot body by a machine without doing any work
It is possible to convert the input energy completely to work by a machine


28. The percentage efficiency of a heat engine working between the temperature T1 K and T2 K (T1 > T2) is given by
(T2 – T1 / T2) x 100
(T1 – T2 / T1) x 100
(T1 / T2) x 100
(T2 / T1) x 100


29. The change in entropy for a system and surrounding are – 0.2287 JK–1  and + 0.260 JK–1 respectively. Then entropy change of the universe is
– 0.0313 JK–1
+ 0.0313 JK–1
+ 0.877 JK–1
– 0.877 JK–1


30. The expression G = H – TS is valid for
constant pressure processes
constant temperature and pressure processes
constant temperature processes
constant volume processes


31. In a chemical reaction, when number of molecules of products are more than the number of molecules of reactants
entropy increases
entropy decreases
heat of vapourisation increases
free energy increases


32. A process accompanied by increase in entropy tends to be
isothermal
adiabatic
spontaneous
non-spontaneous


33. The liquid that deviates from Trouton’s rule is
Hydrochloric acid
Sulphuric acid
Phosphoric acid
Acetic acid

Thank you for participating in the Quiz & Click "Grade Me" to see your Result.

                                             Tamil Medium