Topic 1 Thermodynamics Objective Questions I (Only one correct option) 1. An ideal gas is allowed...

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Topic 1 Thermodynamics Objective Questions I (Only one correct option) 1. An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in kJ is (2019 Main, 12 April I) (a) Cyclic process : q =-W (b) Adiabatic process : AU =-W dchoric process : AU = q Isothermal process : q =-W (а) -9.0 (b) + 10.0 (c) - 0.9 (d) - 20 For silver, C,(JK'mol)= 23+ 0.01 T. If the 2. The difference between AH and AU (AH - AU), when the combustion of one mole of heptane (I) is carried out at temperature T, is equal to (а) - 4 RT (b) 3 RT temperature (T) of 3 moles of silver is raised from 300 K to 1000 K at 1 atm pressure, the value of AH will be close to (2019 Main, 8 April I) (2019 Main, 10 Apri (a) 62 kJ (с) 21 kJ (c) 4 RT (b) 16 kJ (d) 13 kJ 3. A process will be spontaneous at all temperatur (a) AH > 0 and AS <0 (c) AH <0 and AS <0 9. For a diatomic ideal gas in a closed system, which of the following plots does not correctly describe the relation between various thermodynamic quantities? Pamerjelibrary (d) AH > 0 and AS >0 (2019 Main, 12 Jan I) | 4. During compression of a spring the work done is 10 kJ and 2 kJ escaped to the surroundings as heat. The change in internal energy, AU (in kJ) is (a) 8 (2019 Main, 9 April II) Cy (а) (b) -12 (c) 12 (d) -8 5. Among the following the set of parameters that represents path functions, is (A) q + W (B) q (a) (A) and (D) (c) (B), (C) and (D) (2019 Main, 9 April I) (С) W (b) (A), (B) and (C) (d) (B) and (C) (D) H- TS (c) U (d) С V 6. 5 moles of an ideal gas at 100 K are allowed to undergo reversible compression till its temperature becomes 200 K. If Cy = 28 JK- mol, calculate AU and ApV for this process. (R = 8.0 JK'mol) 10. The standard electrode potential E° and its temperature coefficient for a cell are 2V and - 5x 104 VK- at dT (2019 Main, 8 April II) 300 K respectively. The cell reaction is (a) AU = 28 kJ; A(pV)= 0.8kJ (b) AU = 14 J; A(pV)%3D0.8J (c) AU = 14 kJ; A(pV)=4 kJ (d) AU = 14 kJ; A(pV)=18kJ 7. Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas ? (Assume non-expansion work is zero) Zn(s)+ Cu* (aq)→Zn* (aq)+ Cu(s) The standard reaction enthalpy (A, H° ) at 300 K in kJ mol [Use, R = 8 JK moland F = 96,000 C mol] is, (2019 Main, 12 Jan I) (а) — 412.8 (c) 206.4 (b) – 384.0 (d) 192.0 (2019 Main, 8 April I) Topic 1 Thermodynamics Objective Questions I (Only one correct option) 1. An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in kJ is (2019 Main, 12 April I) (a) Cyclic process : q =-W (b) Adiabatic process : AU =-W dchoric process : AU = q Isothermal process : q =-W (а) -9.0 (b) + 10.0 (c) - 0.9 (d) - 20 For silver, C,(JK'mol)= 23+ 0.01 T. If the 2. The difference between AH and AU (AH - AU), when the combustion of one mole of heptane (I) is carried out at temperature T, is equal to (а) - 4 RT (b) 3 RT temperature (T) of 3 moles of silver is raised from 300 K to 1000 K at 1 atm pressure, the value of AH will be close to (2019 Main, 8 April I) (2019 Main, 10 Apri (a) 62 kJ (с) 21 kJ (c) 4 RT (b) 16 kJ (d) 13 kJ 3. A process will be spontaneous at all temperatur (a) AH > 0 and AS <0 (c) AH <0 and AS <0 9. For a diatomic ideal gas in a closed system, which of the following plots does not correctly describe the relation between various thermodynamic quantities? Pamerjelibrary (d) AH > 0 and AS >0 (2019 Main, 12 Jan I) | 4. During compression of a spring the work done is 10 kJ and 2 kJ escaped to the surroundings as heat. The change in internal energy, AU (in kJ) is (a) 8 (2019 Main, 9 April II) Cy (а) (b) -12 (c) 12 (d) -8 5. Among the following the set of parameters that represents path functions, is (A) q + W (B) q (a) (A) and (D) (c) (B), (C) and (D) (2019 Main, 9 April I) (С) W (b) (A), (B) and (C) (d) (B) and (C) (D) H- TS (c) U (d) С V 6. 5 moles of an ideal gas at 100 K are allowed to undergo reversible compression till its temperature becomes 200 K. If Cy = 28 JK- mol, calculate AU and ApV for this process. (R = 8.0 JK'mol) 10. The standard electrode potential E° and its temperature coefficient for a cell are 2V and - 5x 104 VK- at dT (2019 Main, 8 April II) 300 K respectively. The cell reaction is (a) AU = 28 kJ; A(pV)= 0.8kJ (b) AU = 14 J; A(pV)%3D0.8J (c) AU = 14 kJ; A(pV)=4 kJ (d) AU = 14 kJ; A(pV)=18kJ 7. Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas ? (Assume non-expansion work is zero) Zn(s)+ Cu* (aq)→Zn* (aq)+ Cu(s) The standard reaction enthalpy (A, H° ) at 300 K in kJ mol [Use, R = 8 JK moland F = 96,000 C mol] is, (2019 Main, 12 Jan I) (а) — 412.8 (c) 206.4 (b) – 384.0 (d) 192.0 (2019 Main, 8 April I)