At constant temperature the pressure of an ideal gas is doubled its density becomes_______________?
Correct answer: B. Double
- A. Half
- B. Double
- C. Same
- D. None
Explanation
For a fixed amount of ideal gas at constant temperature, density is given by d = PM/RT. Since M, R and T remain constant, doubling the pressure doubles the density. Students may choose a by confusing this result with Boyle's law, where volume becomes half when pressure doubles.
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About Ideal Gas Equation
The ideal gas equation, PV = nRT, relates pressure, volume, amount and absolute temperature when gas particles are assumed to have negligible volume and no intermolecular forces. Applications include finding molar mass, density or an unknown gas variable, with careful use of Kelvin temperature and consistent units, and comparison with real-gas behaviour.
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443 free Gases MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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