BI-400
Diffusion
Biology · Secondary 3 · Hard · Diffusion
A student places four identical beetroot cubes into methylene blue solutions as shown:
P: 1 cm cube in 0.2 mol dm⁻³ dye
Q: 2 cm cube in 0.2 mol dm⁻³ dye
R: 1 cm cube in 0.8 mol dm⁻³ dye
S: 2 cm cube in 0.8 mol dm⁻³ dye
All are left until fully stained. Which cube will take the longest time to be completely stained?
P: 1 cm cube in 0.2 mol dm⁻³ dye
Q: 2 cm cube in 0.2 mol dm⁻³ dye
R: 1 cm cube in 0.8 mol dm⁻³ dye
S: 2 cm cube in 0.8 mol dm⁻³ dye
All are left until fully stained. Which cube will take the longest time to be completely stained?
- P
- Q
- R
- S
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