Simple Diffusion Experiments Quiz
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5 questions, one answer each
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1. What does diffusion demonstrate about particles?
- A. That they are stationary
- B. That they exist and move constantly
- C. That they have no mass
- D. That they only move in solids
2. Which gas is commonly used to show diffusion by its orange-brown colour spreading into air?
- A. Chlorine
- B. Bromine
- C. Ammonia
- D. Hydrogen
3. In the ammonia/hydrochloric acid tube experiment, what forms where the two gases meet?
- A. A blue precipitate
- B. A white ring of ammonium chloride
- C. A colourless gas with no reaction
- D. A black solid
4. Why does the white ring form nearer the hydrochloric acid end of the tube?
- A. HCl diffuses faster than ammonia
- B. Ammonia molecules are lighter and diffuse faster
- C. The tube is tilted
- D. Ammonia does not diffuse
5. Why is diffusion of potassium manganate(VII) in water slower than diffusion of bromine in air?
- A. Liquid particles move faster than gas particles
- B. Liquid particles are closer together and move more slowly than gas particles
- C. Potassium manganate(VII) has no particles
- D. Water blocks diffusion completely