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Free Gases MCQs with Answers

443 Gases MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Gas behaviour is explained through the kinetic molecular theory and the relationships among pressure, volume and temperature. Work includes STP, Boyle's and Charles's laws, absolute zero, the ideal gas equation, and the distinction between ideal and real gases, especially the effects of intermolecular forces and molecular volume.

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Kinetic Molecular TheoryStandard Temperature and PressureBoyle's LawCharles's LawAbsolute ZeroIdeal Gas EquationReal and Ideal Gases
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443 questions · page 23 of 23

441. The volume occupied by 3.2 g of oxygen at STP is:

  • A. 22.4 dm3
  • B. 2.24 dm3
  • C. 11.2 dm3
  • D. 16.0 dm3

Explanation: At STP, one mole of any ideal gas occupies 22.4 dm3. The molar mass of oxygen (O2) is 32 g/mol.

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Correct answer: 2.24 dm3

442. The volume occupied by 1.6 g of O2 at S.T.P is:

  • A. 2.24dm3
  • B. 1.12dm3
  • C. 22.4dm3
  • D. 24dm3

Explanation: To find the volume of 1.6 g of O2 at STP (Standard Temperature and Pressure), we can use the ideal gas law equation: PV = nRT.

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Correct answer: 2.24dm3

443. The volume occupied by 3.2 g of oxygen gas at S.T.P is:

  • A. 1.12 dm3
  • B. 2.24 dm3
  • C. 22.4 dm3
  • D. 24 dm3

Explanation: Option B is correct. The volume occupied by 3.2 g of oxygen gas at STP is 2.24 dm3.

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Correct answer: 2.24 dm3
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