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MCQs

Total Questions : 2096 | Page 22 of 210 pages
Question 211. The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances. This is the
  1.    Lewis-Randall rule
  2.    Statement of Vant-Hoff equation
  3.    Le-Chatelier's principle
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 212. Which of the following is an undesirable characteristics of a refrigerant ?
  1.    It should be non-explosive
  2.    It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils
  3.    Its vapor pressure at the condenser temperature should be very high
  4.    None of these
 Discuss Question
Answer: Option B. -> It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils
Question 213. Linde gas liquefaction process employs cooling
  1.    By throttling
  2.    By expansion in an engine
  3.    At constant pressure
  4.    None of these
 Discuss Question
Answer: Option A. -> By throttling
Question 214. Claude gas liquefaction process employs cooling
  1.    At constant pressure
  2.    By throttling
  3.    By expansion in an engine
  4.    None of these
 Discuss Question
Answer: Option C. -> By expansion in an engine
Question 215. Air-refrigeration cycle
  1.    Is the most efficient of all refrigeration cycles
  2.    Has very low efficiency
  3.    Requires relatively large quantities of air to achieve a significant amount of refrigeration
  4.    Both B and C
 Discuss Question
Answer: Option D. -> Both B and C
Question 216. The quantitative effect of temperature on chemical equilibrium is given by the
  1.    Vant-Hoff equation
  2.    Le-Chatelier's principle
  3.    Arhenius equation
  4.    None of these
 Discuss Question
Answer: Option A. -> Vant-Hoff equation
Question 217. The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.
  1.    Gibbs-Duhem
  2.    Van Laar
  3.    Gibbs-Helmholtz
  4.    Margules
 Discuss Question
Answer: Option A. -> Gibbs-Duhem
Question 218. Enthalpy of a gas depends upon its
  1.    Temperature
  2.    Mass
  3.    Volume
  4.    Pressure
 Discuss Question
Answer: Option A. -> Temperature
Question 219. The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is
  1.    ∞
  2.    1
  3.    0
  4.    -ve
 Discuss Question
Answer: Option C. -> 0
Question 220. The compressibility factor for an ideal gas is 1. Its value for any other real gas is
  1.    1
  2.    < 1
  3.    > 1
  4.    Either (b) or (c), depends on the nature of the gas
 Discuss Question
Answer: Option D. -> Either (b) or (c), depends on the nature of the gas

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