$^{1(N)}$Complete Chemistry for Cambridge IGCSE, page number N. Link to the book: https://drive.google.com/file/d/1Zp_nuiNRmTyLQsI3adMXf_CpRHP1xDi4/view?usp=sharing
$^2$https://sciencing.com/four-things-affect-rate-diffusion-8348637.html
$^3$https://byjus.com/chemistry/mixtures/
$^4$https://www.britannica.com/science/solution-chemistry
$^5$https://www.britannica.com/science/paper-chromatography
$^6$My dad’s notes. File: