JEE · NEET Previous Year Question
Which among the following statements is/are incorrect regarding real gases?
(i) Their compressibility factor is never equal to unity .
(ii) The deviations from ideal behaviour are less at low pressure and high temperatures.
(iii) Intermolecular forces among gas molecules are equal to zero.
(iv) They obey van der Waal's equation,
Topic: JEE PYQ
Answer: D. Full step-by-step solution below.
- A(i), (ii) and (iv)
- B(ii) and (iv)
- COnly (ii)
- D(iii) and (iv)
Correct answer: D
Solution
(d)(i) For real gases compressibility factor (Z) cannot be unity, while compressibility factor for an ideal gas is one.
(ii) A gas can behave like an ideal gas at very high temperature and low pressure. Hence, show very less deviation.
(iii) Intermolecular forces among gas molecules are weak as compare to liquid and solid but, these forces cannot be zero.
(iv) Ideal gas follows van der Waal's equation
Gases which do not follow this equation are real gases
More States of Matter PYQs
- The most probable velocity of a gas at is equal to the RMS velocity of gas at . The…
- What is the total pressure exerted by the mixture of 7.0 g of , 2 g of hydrogen and 8.0 g of sulphur dioxide gases in a ves…
- The standard molar enthalpy of vaporisation of and liquids i…
- Which one of the following is the wrong statement about the liquid?
- A gas deviates from ideal behaviour at a high pressure because its molecules