Question 6
- List two factors that can affect the rate of diffusion.
- State two examples to illustrate the effects of surface tension.
The question was poorly attempted. In part (a), most candidates were able to mention temperature as a factor affecting the rate of diffusion. However, majority of the candidates listed “concentration’ instead of concentration gradient as the second factor.
In part (b), some candidates confused diffusion with surface tension. Hence they could hardly state one example correctly
