Chemical Thermodynamics And Energetics MCQs
Chemical Thermodynamics And Energetics MCQs
Our experts have gathered these Chemical Thermodynamics And Energetics MCQs through research, and we hope that you will be able to see how much knowledge base you have for the subject of Chemical Thermodynamics And Energetics by answering these 20 multiple-choice questions.
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1: The values for enthalpy of combustion is H2, CH4, C2H6 and graphite are -285.8, -890, -1560 and 393.5 kJ respectively. The standard enthalpy of formation ofC3H8 is -103.8 kJ/ mol. The enthalpy of reaction is C3H8 + H2 - -> C2H6 + CH4.
A. -557 kJ / mol.
B. – 45.7 kJ / mol.
C. 55.7 kJ / mol.
D. -55.7 kJ / mol.
2: A -> B, ?H = -1.84 kJ, this means:
A. A is stable than B.
B. B can be easily converted to A.
C. B cannot be easily formed from A.
D. B is stable than A.
3: ΔH will be more than ΔE in:
A. C + ½ O2 -> CO.
B. H2 + I2 -> 2 HI
C. 2 NO2 -> N2O4
D. 4NO2 + O2 -> 2 N2O5
4: Which is a type of kinetic energy?
A. Intermolecular energy.
B. Intramolecular energy.
C. None of these.
D. Nuclear binding energy.
5: 11 kg of a gas expands isothermally and reversibly. The amount of work done is minimum if the gas is:
A. O2
B. Cl2.
C. CH4.
D. NO2.
6: Intensive property is one whose:
A. Value depends upon the quantity of matter present in the system.
B. Value does not depend upon the quality of matter present in the system.
C. Value depends upon the quality of matter present in the system.
D. Value does not depend upon the quantity of matter present in the system.
7: The work done in joule for the reversible expansion of 1 mole of an ideal gas from a volume of 10 lit to 20 lit at 25°C is:
A. 2.303 x 298 x 82 log 2.
B. 2.303 x 298 x 2 log2.
C. 2.303 x 298 x 0.082 log 0.5.
D. 298 x 2.303 x 8.31 x log2.
8: A gas enclosed in a cylinder of cross–sectional area 350 cm2 expands against constant pressure of 1.5 atm. The piston moves 5cm up the work done in lit–atm is:
A. 3.5.
B. 2.625
C. 3500.
D. 2625.
9: A system which can exchange only energy but not matter with the surrounding is known as:
A. Closed system.
B. None of these.
C. Open system.
D. Isolated system.
10: Which among the following is not an example of irreversible process?
A. Mixing of two gases.
B. Expansion of gas in vacuum.
C. Rusting of iron in moist air.
D. None of these.
11: Which of the statement is correct for strong acids and strong bases?
A. All of these.
B. Magnitude of heat of hydration is high.
C. Magnitude of heat of ionisation is low.
D. Almost all mole get ionised.
12: Which is the correct mathematical equation?
A. All of these
B. ?H = ?E + ?PV.
C. ?E = ?H + ?PV.
D. ?PV = ?E + ?H.
13: ……….. helps in cooling a gas when it is subjected to adiabatic expansion
A. Fall in temperature.
B. Loss of kinetic energy
C. Decrease in velocity.
D. Energy used in doing work.
14: Exothermic change is observed in:
A. Condensation of liquid.
B. Evaporation of liquid.
C. Fusion of solid.
D. None of these.
15: Dil.H2SO4 solution is used for neutralization of equal volumes of molar KOH and NaOH. X kcal and Y kcals of heat are liberated respectively. Which of the following is true?
A. None.
B. X = 0.5 y
C. X = ½ y
D. X = y
16: Maximum work is obtained in:
A. Reversible isothermal process.
B. Adiabatic process.
C. Irreversible isothermal process.
D. Irreversible process.
17: The heat for neutralization of HCL with NaOH is – 47.21 kJ per gm equi. What will be the heat evolved during neutralization of CH3COOH with NaOH.
A. Equal to the heat of reaction.
B. > 47.21 kJ.
C. < 47.21 kJ.
D. = 47.21 kJ.
18: Neon molecule possesses:
A. Potential as well as translational energy.
B. Only potential energy.
C. Translational energy only.
D. Vibrational as well as translational energy
19: If the heat released in compression of gas remain inside the system then it causes:
A. An increase in temperature of the system.
B. Decrease in temperature of the system and An increase in temperature of the system.
C. Decrease in temperature of the system.
D. None of these
20: Decrease in temperature of the system is observed in:
A. Adiabatic compression.
B. Adiabatic expansion.
C. Isothermal compression.
D. Isothermal expansion.
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