My books and ebooks
My writings on the subject of Chem, Physics and Maths are building up. Since 2001, I've been writing these ebooks, and enhancing them. I keep getting feedback on how to make it better. So later please come again to check for new versions.
O level Chemistry, "Q&A on Chemistry", physical book, buy at major bookstores.
O level Chemistry, "Mol Calculation is sooo easy, My Grandma Can Do It", ebook, pdf format, download at US$ 8.88.
O level Chemistry, "Balancing equation", online presentation, free.
O level Chemistry, "Acid", online presentation, free.
O level Chemistry, "Base", online presentation, free.
O level Chemistry, "Redox reaction", ebook, pdf format, download at US$ 8.88.
A level Chemistry, Chapter 01, "Composition of mineral" , online presentation, free.
A level Chemistry, Chapter 01, "Stoichiometry QnA" , ebook, pdf, free download.
A level Chemistry, Chapter 02, "Atomic Structure QnA", ebook, pdf, free download.
A level Chemistry, Chapter 04, "Ideal gas QnA", ebook, pdf, free download.
A level Chemistry, Chapter 07, "Reversible Reaction", ebook, pdf, free download.
A level Chemistry, Chapter 07, "pH Calculation", ebook, pdf, free download.
A level Chemistry, Chapter 14, "List of Organic Reactions", ebook, pdf, free download.
O level Physics, "Heat energy", online presentation, free.
O level Physics, "DC Circuit", ebook, pdf, free download.