Technically, no. Unless the blog has explicit permission from Pearson, it is copyright infringement. However, ZIMSEC and the Ministry have turned a blind eye to students sharing PDFs for personal use during the economic crisis, but you do so at your own risk regarding malware and outdated info.
Many students fear the Alternative to Practical (Paper 3) or the Practical Exam (Paper 2). The Green Book often contains typical practical scenarios, methods for testing ions (cations and anions), and how to draw apparatus setups correctly—a critical skill for scoring high marks. Zimsec O Level Chemistry Green Book Pdf
Which (Paper 1, 2, or 4) are you struggling with? Technically, no