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MCQs

Total Questions : 2096 | Page 1 of 210 pages
Question 1. Sublimation temperature of dry ice (solid CO₂) is __________ °C.
  1.    -273
  2.    0
  3.    -78
  4.    5
 Discuss Question
Answer: Option C. -> -78
Question 2. The equation relating E, P, V and T which is true for all substanes under all conditions is given by (∂E/∂V)T = T.(∂P/∂T)H - P . This equation is called the
  1.    Maxwell
  2.    Thermodynamic equation of state
  3.    Equation of state
  4.    Redlich-Kwong equation of state
 Discuss Question
Answer: Option B. -> Thermodynamic equation of state
Question 3. Henry's law is closely obeyed by a gas, when its __________ is extremely high.
  1.    Pressure
  2.    Solubility
  3.    Temperature
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 4. If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero.
  1.    Enthalpy
  2.    Volume
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 5. The ammonia synthesis reaction represented by N₂ + 3H₂ ⇋ 2NH₃ ; ΔH = - 22.4 kcal, is
  1.    Endothermic
  2.    Exothermic
  3.    Isothermal
  4.    Adiabatic
 Discuss Question
Answer: Option B. -> Exothermic
Question 6. Free energy changes for two reaction mechanism 'X' and 'Y are respectively - 15 and - 5 units. It implies that X is
  1.    Slower than Y
  2.    Faster than Y
  3.    Three times slower than Y
  4.    Three times faster than Y
 Discuss Question
Answer: Option B. -> Faster than Y
Question 7. Which of the following has the minimum value of COP for a given refrigeration effect?
  1.    Reverse Carnot cycle
  2.    Ordinary vapour-compression cycle
  3.    Vapour-compression process with a reversible expansion engine
  4.    Air refrigeration cycle
 Discuss Question
Answer: Option D. -> Air refrigeration cycle
Question 8. In the reaction, H₂ +I₂ ⇋ 2HI, addition of an inert gas will
  1.    Increase the partial pressure of H₂
  2.    Increase the partial pressure of I₂
  3.    Increase the total pressure and hence shift the equilibrium towards the right
  4.    Not effect the equilibrium conditions
 Discuss Question
Answer: Option D. -> Not effect the equilibrium conditions
Question 9. No work is done by the system, when a reaction occurs at constant
  1.    Volume
  2.    Temperature
  3.    Pressure
  4.    None of these
 Discuss Question
Answer: Option A. -> Volume
Question 10. The work done in isothermal compression compared to that in adiabatic compression will be
  1.    Less
  2.    More
  3.    Same
  4.    More or less depending upon the extent of work done
 Discuss Question
Answer: Option B. -> More

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