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JEE Main · 2019 · 09 Jan 2019 · Shift 1 · Solutions

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Which one of the following statements regarding Henry's law is not correct?
  1. (A)Higher the value of at a given pressure, higher is the solubility of the gas in the liquids✓ Correct
  2. (B)Different gases have different (Henry's law constant) values at the same temperature
  3. (C)The partial pressure of the gas in vapour phase is proportional to the mole fraction of the gas in the solution
  4. (D)The value of increases with increase of temperature and is function of the nature of the gas.

Answer: (A)

Solution

Henry's law reads , so for a given partial pressure a larger means a smaller mole fraction dissolved, that is lower solubility. The statement claiming a higher means higher solubility therefore reverses the real trend and is the incorrect one, while the remaining statements about different gases having different , rising with temperature, and being proportional to mole fraction are all sound.

JEE Main · 2019 · 09 Jan 2019 · Shift 1 · Single correct option

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