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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3rg198

The Boyle temperatures of three gases are: P, ; Q, ; R, . Which statements are correct regarding their behaviour at ?

  1. AP and Q have greater than 1 at all pressures
  2. BR shows a minimum in its versus curve
  3. CP warms on Joule-Thomson expansion
  4. DQ warms on Joule-Thomson expansion

Answer: A, B, C

is above of P and Q, so both have above 1 everywhere (A true), and below of R, so R shows a dip (B true). : P has , so it warms (C true); Q has , above , so Q cools (D false).
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