Question:
Which of the following statements is true about ideal gas ?
Which of the following statements is true about ideal gas ?
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An ideal gas is a theoretical model that no real gas fully matches.
Updated On: Oct 1, 2026
- It shows deviation from Boyle's law and Charles' law.
- Its molecules are not perfectly elastic.
- It does not exist.
- Intermolecular attraction is present in it, hence a collision takes place with loss of kinetic energy.
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
An ideal gas follows \(PV = nRT\) at every pressure and temperature. Its molecules have negligible volume and no mutual attraction, and all collisions are perfectly elastic.
Step 2: Detailed Explanation:
Real gases deviate from this behaviour, because their molecules have finite volume and attract one another. A gas that obeys the gas laws exactly under all conditions is only a theoretical model.
So the statement "It does not exist" is the true one here.
Option (A) describes a real gas, since an ideal gas obeys Boyle's and Charles' laws exactly. Option (B) does not describe an ideal gas, because its collisions are perfectly elastic. Option (D) also does not describe it, because an ideal gas has no intermolecular attraction and loses no kinetic energy in collisions.
Step 3: Final Answer:
Option (C) is the statement that holds.
Final Answer:
An ideal gas is only a hypothetical model. \[ \boxed{\text{(C) }\text{It does not exist}} \]
An ideal gas follows \(PV = nRT\) at every pressure and temperature. Its molecules have negligible volume and no mutual attraction, and all collisions are perfectly elastic.
Step 2: Detailed Explanation:
Real gases deviate from this behaviour, because their molecules have finite volume and attract one another. A gas that obeys the gas laws exactly under all conditions is only a theoretical model.
So the statement "It does not exist" is the true one here.
Option (A) describes a real gas, since an ideal gas obeys Boyle's and Charles' laws exactly. Option (B) does not describe an ideal gas, because its collisions are perfectly elastic. Option (D) also does not describe it, because an ideal gas has no intermolecular attraction and loses no kinetic energy in collisions.
Step 3: Final Answer:
Option (C) is the statement that holds.
Final Answer:
An ideal gas is only a hypothetical model. \[ \boxed{\text{(C) }\text{It does not exist}} \]
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