1. Decrease in temperature of the system is observed in:
Answer
Correct Answer:
Adiabatic expansion.
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2. If the heat released in compression of gas remain inside the system then it causes:
Answer
Correct Answer:
Decrease in temperature of the system and An increase in temperature of the system.
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3. Neon molecule possesses:
Answer
Correct Answer:
Potential as well as translational energy.
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4. 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.
Answer
Correct Answer:
< 47.21 kJ.
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5. Maximum work is obtained in:
Answer
Correct Answer:
Reversible isothermal process.
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6. 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?
Answer
Correct Answer:
X = y
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7. Exothermic change is observed in:
Answer
Correct Answer:
Condensation of liquid.
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8. ……….. helps in cooling a gas when it is subjected to adiabatic expansion
Answer
Correct Answer:
Energy used in doing work.
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9. Which is the correct mathematical equation?
Answer
Correct Answer:
All of these
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10. Which of the statement is correct for strong acids and strong bases?
Answer
Correct Answer:
All of these.
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11. Which among the following is not an example of irreversible process?
Answer
Correct Answer:
None of these.
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12. A system which can exchange only energy but not matter with the surrounding is known as:
Answer
Correct Answer:
Closed system.
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13. 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:
Answer
Correct Answer:
2625.
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14. 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:
Answer
Correct Answer:
298 x 2.303 x 8.31 x log2.
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15. Intensive property is one whose:
Answer
Correct Answer:
Value does not depend upon the quantity of matter present in the system.
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16. 11 kg of a gas expands isothermally and reversibly. The amount of work done is minimum if the gas is:
Answer
Correct Answer:
Cl2.
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17. Which is a type of kinetic energy?
Answer
Correct Answer:
None of these.
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18. ΔH will be more than ΔE in:
Answer
Correct Answer:
C + ½ O2 -> CO.
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19. A -> B, ?H = -1.84 kJ, this means:
Answer
Correct Answer:
B is stable than A.
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20. 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.
Answer
Correct Answer:
-55.7 kJ / mol.
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