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CAIE IGCSE Chemistry 1.2.2 Effect of Relative Molecular Mass on Questions

Use relative molecular mass and diffusion experiments to compare how quickly gases spread.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • compare gas diffusion rates using relative molecular mass
  • rank gases from slowest to fastest diffusion
  • use diffusion experiments to identify or compare gases
  • explain the effect of temperature and molecular mass on diffusion

CAIE IGCSE Chemistry 1.2.2 Effect of Relative Molecular Mass on Questions question 1

[Maximum number: 1]

Which gas has the slowest rate of diffusion?

A

H2\mathrm{H}_{2}

B

NH3\mathrm{NH}_{3}

C

CH4\mathrm{CH}_{4}

D

CO2\mathrm{CO}_{2}

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